Consumer medicine information

BTC Pantoprazole

Pantoprazole

BRAND INFORMATION

Brand name

BTC Pantoprazole

Active ingredient

Pantoprazole

Schedule

S4

 

Consumer medicine information (CMI) leaflet

Please read this leaflet carefully before you start using BTC Pantoprazole.

SUMMARY CMI

BTC Pantoprazole

Consumer Medicine Information (CMI) summary

The full CMI on the next page has more details. If you are worried about using this medicine, speak to your doctor or pharmacist.

1. Why am I using BTC Pantoprazole?

BTC Pantoprazole contains the active ingredient pantoprazole (as sodium sesquihydrate). BTC Pantoprazole is used to treat and help heal duodenal and gastric ulcers; treat reflux oesophagitis or reflux disease and treat Zollinger-Ellison syndrome.

For more information, see Section 1. Why am I using BTC Pantoprazole? in the full CMI.

2. What should I know before I use BTC Pantoprazole?

Do not use if you have ever had an allergic reaction to pantoprazole (as sodium sesquihydrate) or any of the ingredients listed at the end of the CMI. Talk to your doctor if you have any other medical conditions, take any other medicines, or are pregnant or plan to become pregnant or are breastfeeding.

For more information, see Section 2. What should I know before I use BTC Pantoprazole? in the full CMI.

3. What if I am taking other medicines?

Some medicines may interfere with BTC Pantoprazole and affect how it works.

A list of these medicines is in Section 3. What if I am taking other medicines? in the full CMI.

4. How do I use BTC Pantoprazole?

  • The dose and frequency of BTC Pantoprazole that your doctor prescribes for you depends on your medical condition.
  • Your doctor may change the dose as your condition changes.
  • Swallow the tablets whole with a full glass of water with or without food. Do not crush or chew the tablets.

More instructions can be found in Section 4. How do I use BTC Pantoprazole? in the full CMI.

5. What should I know while using BTC Pantoprazole?

Things you should do
  • Remind any doctor, dentist or pharmacist you visit that you are using BTC Pantoprazole.
  • Tell your doctor if your reflux symptoms return after you stop taking this medicine.
  • If you become pregnant while you are taking this medicine, tell you doctor or pharmacist immediately.
Things you should not do
  • Do not take BTC Pantoprazole to treat any other complaints unless your doctor tells you to.
  • Do not give your medicine to anyone else, even if they have the same condition as you.
Driving or using machines
  • Be careful before you drive or use any machines or tools until you know how BTC Pantoprazole affects you.
Drinking alcohol
  • Tell your doctor if you drink alcohol.
Looking after your medicine
  • Store tablets below 25°C.

For more information, see Section 5. What should I know while using BTC Pantoprazole? in the full CMI.

6. Are there any side effects?

Common side effects: headache, dizziness, nausea or vomiting, diarrhoea, stomach pain, excessive gas in the stomach or bowel, constipation, indigestion.

Serious side effects: unusual tiredness or weakness, blood in the urine, increased or decreased need to urinate, frequent infections.

For more information, including what to do if you have any side effects, see Section 6. Are there any side effects? in the full CMI.



FULL CMI

BTC Pantoprazole

Active ingredient(s): Pantoprazole (as sodium sesquihydrate)

Consumer Medicine Information (CMI)

This leaflet provides important information about using BTC Pantoprazole. You should also speak to your doctor or pharmacist if you would like further information or if you have any concerns or questions about using BTC Pantoprazole.

Where to find information in this leaflet:

1. Why am I using BTC Pantoprazole?
2. What should I know before I use BTC Pantoprazole?
3. What if I am taking other medicines?
4. How do I use BTC Pantoprazole?
5. What should I know while using BTC Pantoprazole?
6. Are there any side effects?
7. Product details

1. Why am I using BTC Pantoprazole?

BTC Pantoprazole contains the active ingredient pantoprazole (as sodium sesquihydrate). BTC Pantoprazole is belongs to a group of medicines called proton pump inhibitors (PPIs). It works by decreasing the amount of acid the stomach makes to give relief from the symptoms and allow healing to take place.

BTC Pantoprazole is used to:

  • treat and help heal duodenal and gastric ulcers
  • treat reflux oesophagitis or reflux disease
  • treat a rare condition called Zollinger-Ellison syndrome, where the stomach produces very large amounts of acid, much more than in ulcers and reflux disease.

2. What should I know before I use BTC Pantoprazole?

Warnings

Do not use BTC Pantoprazole if:

  • you are allergic to pantoprazole (as sodium sesquihydrate), or any of the ingredients listed at the end of this leaflet. Always check the ingredients to make sure you can use this medicine. Some of the symptoms of an allergic reaction may include:
    - shortness of breath
    - wheezing or difficulty breathing
    - swelling of the face, lips, tongue or other parts of the body
    - skin rash, itching or hives on the skin.
  • you take atazanavir or nelfinavir (an anti-viral medication).
  • you have cirrhosis or severe liver disease
  • you are allergic to any of the antibiotics or medicines your doctor may prescribe with BTC Pantoprazole.
  • you have moderate to severe kidney disease

Check with your doctor if you:

  • have any other medical conditions
    - moderate to severe liver or kidney disease
  • take any medicines for any other condition
  • have any of the following symptoms
    - unintentional weight loss
    - repeated vomiting
    - vomiting blood
    - difficulty or pain when swallowing
    - you look pale and feel weak
    - you notice blood in your stools
    Your doctor may need to perform some additional tests before you take BTC Pantoprazole.

During treatment, you may be at risk of developing certain side effects. It is important you understand these risks and how to monitor for them. See additional information under Section 6. Are there any side effects?

Pregnancy and breastfeeding

Check with your doctor if you are pregnant or intend to become pregnant.

Talk to your doctor if you are breastfeeding or intend to breastfeed.

Your doctor can discuss with you the risks and benefits involved.

Use in Children

  • There is not enough information to recommend the use of this medicine for children.
  • This medicine should not be given to children under the age of 5 years.
    Safety and effectiveness in children younger than 5 years has not been established.

3. What if I am taking other medicines?

Tell your doctor or pharmacist if you are taking any other medicines, including any medicines, vitamins or supplements that you buy without a prescription from your pharmacy, supermarket or health food shop.

Some medicines may interfere with BTC Pantoprazole and affect how it works. These include:

  • atazanavir or nelfinavir - medicines used to treat viral infections such as HIV
  • warfarin or phenprocoumon - medicines used to prevent blood clots (anticoagulants)
  • ketoconazole, itraconazole, posaconazole - medicines used to treat fungal infection
  • tacrolimus, mycophenolate mofetil - medicines used to suppress the immune system
  • methotrexate - a medicine used to treat arthritis and some types of cancer
  • erlotinib or related medicines used to treat cancer
  • fluvoxamine - a medicine used to treat anxiety and depression.

Check with your doctor or pharmacist if you are not sure about what medicines, vitamins or supplements you are taking and if these affect BTC Pantoprazole.

4. How do I use BTC Pantoprazole?

How much to take

  • Follow the instructions provided. If you take the wrong dose, BTC Pantoprazole may not work as well and your problem may not improve.
  • The usual dose is 40 mg per day.
    However, if your doctor also prescribes antibiotics in combination with BTC Pantoprazole for the treatment of duodenal ulcers, the dose of BTC Pantoprazole is 80 mg per day. The first 40 mg dose should be taken in the morning and the second should be taken before the evening meal for 7 days.
  • Your doctor may have prescribed a different dose.
  • The dose and frequency of BTC Pantoprazole that your doctor prescribes for you depends on your medical condition.
    Your doctor may change the dose as your condition changes.
  • Ask your doctor or pharmacist if you are unsure of the correct dose for you.
    They will tell you exactly how much to take.

When to take BTC Pantoprazole

  • Take your medicine at about the same time each day.
    Taking it at the same time each day will have the best effect. It will also help you remember when to take it. If you are taking other medicines, like antibiotics, in combination with BTC Pantoprazole therapy, follow the instructions for the use of each medicine carefully.

How to take BTC Pantoprazole

  • Swallow the tablets whole with a full glass of water with or without food.
  • Do not crush or chew the tablets.
    The tablets have a special coating to protect them from the acidic contents of your stomach. For the tablets to work effectively, this coating must not be broken.

How to long to take BTC Pantoprazole

  • Continue taking your medicine for as long as your doctor tells you.

If you forget to use BTC Pantoprazole

Take your dose as soon as you remember, and continue to take it as you would normally.

If it is almost time for your next dose, skip the dose you missed and take your next dose when you are meant to.

Do not take a double dose to make up for the dose you missed.

This may increase the chance of you getting an unwanted side effect.

If you are not sure what to do, ask your doctor or pharmacist.

If you have trouble remembering to take your medicine, ask your pharmacist for some hints.

If you use too much BTC Pantoprazole

If you think that you have used too much BTC Pantoprazole, you may need urgent medical attention.

You should immediately:

  • phone the Poisons Information Centre
    (by calling 13 11 26), or
  • contact your doctor, or
  • go to the Emergency Department at your nearest hospital.

You should do this even if there are no signs of discomfort or poisoning.

5. What should I know while using BTC Pantoprazole?

Things you should do

Always follow your doctor's instructions carefully.

If you are about to be started on any new medicine, remind your doctor and pharmacist that you are taking BTC Pantoprazole.

Tell any other doctors, dentists, and pharmacists who treat you that you are taking this medicine.

If you are going to have surgery, tell the surgeon that you are taking this medicine.

If you are about to have any blood tests, tell your doctor that you are taking this medicine.
It may interfere with the results of some tests.

Keep all of your doctor's appointments so that your progress can be checked.

Your doctor may do some tests from time to time to make sure the medicine is working and to prevent unwanted side effects.

Tell your doctor if your reflux symptoms return after you stop taking this medicine.

The symptoms of reflux may return after stopping this medicine suddenly, especially if you have taken it for a while.

Call your doctor straight away if you:

  • Become pregnant while you are taking this medicine
  • Notice reflux symptoms return after you stop taking this medicine. The symptoms of reflux may return after stopping this medicine suddenly, especially if you have taken it for a while.

Remind any doctor, dentist or pharmacist you visit that you are using BTC Pantoprazole.

Things you should not do

  • Do not take BTC Pantoprazole to treat any other complaints unless your doctor tells you to.
  • Do not give your medicine to anyone else, even if they have the same condition as you.

Driving or using machines

Be careful before you drive or use any machines or tools until you know how BTC Pantoprazole affects you.

This medicine is not expected to affect your ability to drive a car or operate machinery. However, do not drive a car or operate machines if you experience side effects such as dizziness or blurred vision.

Drinking alcohol

Tell your doctor if you drink alcohol.

Things that may help your condition

Some self help measures suggested below may help your condition. Your doctor or pharmacist can give you more information about these measures.

  • Alcohol – your doctor may advise you to limit your alcohol intake.
  • Aspirin and many other medicines used to treat arthritis, period pain, headaches – these medicines may irritate the stomach and may make your condition worse. Your doctor or pharmacist may suggest other medicines you can take.
  • Caffeine – your doctor may advise you to limit the number of drinks which contain caffeine, such as coffee, tea, cocoa and cola drinks, because they contain ingredients that may irritate your stomach.
  • Eating habits – eat smaller, more frequent meals. Eat slowly and chew your food carefully. Try not to rush at meals times.
  • Smoking – your doctor may advise you to stop smoking or at least cut down.
  • Weight – your doctor may suggest losing some weight to help your condition.

Looking after your medicine

  • Keep your medicine in the original container.
    If you take it out of its original container it may not keep well.

Follow the instructions in the carton on how to take care of your medicine properly.

Store it in a cool dry place where the temperature stays below 25°C, away from moisture, heat or sunlight; for example, do not store it:

  • in the bathroom or near a sink, or
  • in the car or on window sills.

Keep it where young children cannot reach it.

A locked cupboard at least one-and-a-half metres above the ground is a good place to store medicines.

Getting rid of any unwanted medicine

If you no longer need to use this medicine or it is out of date, take it to any pharmacy for safe disposal.

Do not use this medicine after the expiry date printed on the pack, if the packaging is torn or shows signs of tampering.

6. Are there any side effects?

All medicines can have side effects. If you do experience any side effects, most of them are minor and temporary. However, some side effects may need medical attention.

See the information below and, if you need to, ask your doctor or pharmacist if you have any further questions about side effects.

Less serious side effects

Less serious side effectsWhat to do
General
  • headache
  • dizziness
  • weakness or tiredness
Gut or Gastrointestinal related
  • nausea or vomiting
  • diarrhoea
  • stomach pain
  • excessive gas in the stomach or bowel
  • constipation
  • indigestion
  • dry mouth
  • metallic taste
Eyes related
  • blurred vision
Skin related
  • skin problems such as itchiness and rash
Others
  • increased sweating or body temperature
  • trouble sleeping.
Speak to your doctor if you have any of these less serious side effects and they worry you.
They are generally mild and do not cause patients to stop taking BTC Pantoprazole.

Serious side effects

Serious side effectsWhat to do
Liver related
  • nausea or vomiting in combination with loss of appetite, feeling generally unwell, fever, itching, yellowing of the skin and eyes, and dark coloured urine
Skin related
  • severe skin problems such as itchiness, redness, rash with swelling, blistering or peeling of the skin or rash when exposed to sun, possibly with pain in the joints and general fever
Allergy related
  • swelling of the face, lips, mouth, tongue or throat which may cause difficulty in swallowing or breathing
Infection related
  • frequent infections such as fever, severe chills, sore throat or mouth ulcers
  • severe and/or persistent diarrhoea, because this medicine has been associated with a small increase in infectious diarrhoea.
Bones related
  • bone fracture of the hip, wrist or spine (mainly a risk in people who take high doses of PPIs or use them long term (a year or longer))
Electrolytes related
  • symptoms such as seizures, abnormal or fast heartbeat or jerking/shaking movements. These can be a sign of low magnesium, calcium or potassium levels in your blood
Others
  • unusual tiredness or weakness
  • blood in the urine
  • increased or decreased need to urinate
  • chest pain
  • shortness of breath
  • high blood pressure
  • water retention, swelling
  • bleeding or bruising more easily than normal
  • depression, confusion or anxiety
Call your doctor straight away, or go straight to the Emergency Department at your nearest hospital if you notice any of these serious side effects.

Tell your doctor or pharmacist if you notice anything else that may be making you feel unwell.

Other side effects not listed here may occur in some people.

Reporting side effects

After you have received medical advice for any side effects you experience, you can report side effects to the Therapeutic Goods Administration online at www.tga.gov.au/reporting-problems. By reporting side effects, you can help provide more information on the safety of this medicine.

Always make sure you speak to your doctor or pharmacist before you decide to stop taking any of your medicines.

7. Product details

This medicine is only available with a doctor's prescription.

What BTC Pantoprazole contains

Active ingredient
(main ingredient)		pantoprazole (as sodium sesquihydrate)
Other ingredients
(inactive ingredients)
  • sodium carbonate anhydrous
  • microcrystalline cellulose
  • crospovidone
  • hydroxypropylcellulose
  • colloidal anhydrous silica
  • calcium stearate
  • Opadry complete film coating system 03B22011 Yellow
  • Eudragit L30D-55
  • triethyl citrate
Potential allergensThis medicine does not contain gluten, lactose or sucrose.

Do not take this medicine if you are allergic to any of these ingredients.

What BTC Pantoprazole looks like

BTC Pantoprazole 20mg – yellow and oval shaped enteric coated tablets. Pack size of 30 tablets (Aust R 407937).

BTC Pantoprazole 40mg – yellow and oval shaped enteric coated tablets. Pack size of 5 and 30 tablets
(Aust R 407938).

Who distributes BTC Pantoprazole

Sandoz Pty Ltd
ABN 60 075 449 553
54 Waterloo Road
Macquarie Park, NSW 2113
Tel: 1800 726 369

This leaflet was prepared in July 2023.

Published by MIMS April 2024

BRAND INFORMATION

Brand name

BTC Pantoprazole

Active ingredient

Pantoprazole

Schedule

S4

 

1 Name of Medicine

Pantoprazole sodium sesquihydrate.

2 Qualitative and Quantitative Composition

Each BTC Pantoprazole 20 mg enteric coated tablet contains 22.55 mg pantoprazole sodium sesquihydrate equivalent to 20 mg of pantoprazole.
Each BTC Pantoprazole 40 mg enteric coated tablet contains 45.10 mg of pantoprazole sodium sesquihydrate equivalent to 40 mg of pantoprazole.
For the full list of excipients, see Section 6.1 List of Excipients.

3 Pharmaceutical Form

BTC Pantoprazole 20 mg tablets are yellow and oval shaped enteric-coated tablets.
BTC Pantoprazole 40 mg tablets are yellow and oval shaped enteric-coated tablets.

4 Clinical Particulars

4.1 Therapeutic Indications

Adults.

1. For symptomatic improvement and healing of the following gastrointestinal diseases which require a reduction in acid secretion:
Duodenal ulcer;
Gastric ulcer;
Gastro-oesophageal reflux disease (GORD): symptomatic GORD. The treatment of heartburn and other symptoms associated with GORD; reflux oesophagitis;
Gastrointestinal lesions refractory to H2 blockers;
Zollinger-Ellison Syndrome.
Patients whose gastric or duodenal ulceration is not associated with ingestion of non-steroidal anti-inflammatory drugs (NSAIDs) require treatment with antimicrobial agents in addition to antisecretory drugs whether on first presentation or on recurrence.
2. Maintenance of healed reflux oesophagitis in patients previously treated for moderate to severe reflux oesophagitis.
3. For eradication of Helicobacter pylori, treatment with pantoprazole and one of the following combinations of antibiotics:
Clarithromycin and amoxicillin or,
Clarithromycin and metronidazole or,
Amoxicillin and metronidazole,
is recommended in cases of duodenal ulcer and gastric ulcer with the objective of reducing the recurrence of duodenal and gastric ulcers caused by this microorganism (see Section 4.2 Dose and Method of Administration).
4. Pantoprazole in combination with bismuth, metronidazole and tetracycline is indicated for the eradication of Helicobacter pylori associated with peptic ulcer disease with the objective of reducing the recurrence of peptic ulcers caused by this organism.
5. Prevention of gastroduodenal lesions and dyspeptic symptoms associated with non-selective non-steroidal anti-inflammatory drugs (NSAIDs) in increased risk patients with a need for continuous non-selective NSAID treatment.

4.2 Dose and Method of Administration

Dosage.

Adults. BTC Pantoprazole tablets should not be chewed or crushed but swallowed whole with a little water.
In H. pylori positive patients with gastric and duodenal ulcers, eradication of this microorganism by combination therapy should be achieved. One of the following combinations of pantoprazole with antibiotics is effective:
a) BTC Pantoprazole 40 mg twice daily: plus amoxicillin 1000 mg (2 x 500 mg) twice daily, plus clarithromycin 500 mg twice daily.
b) BTC Pantoprazole 40 mg twice daily: plus metronidazole 400 mg in the morning and 600 mg at night, plus clarithromycin 500 mg twice daily.
c) BTC Pantoprazole 40 mg twice daily: plus amoxicillin 1000 mg (2 x 500 mg) twice daily, plus metronidazole 400 mg in the morning and 600 mg at night.
d) BTC Pantoprazole 40 mg twice daily: plus bismuth subcitrate 108 mg four times a day, plus metronidazole 200 mg three times a day and 400 mg at night, plus tetracycline 500 mg (2 x 250 mg) four times a day.
In combination therapy for eradication of H. pylori infection, the second BTC Pantoprazole tablet should be taken before the evening meal. The duration for combination therapy is 7 days. If further treatment with BTC Pantoprazole is indicated to ensure ulcer healing, dosage recommendations as listed below for duodenal and gastric ulcers should be followed.
In H. pylori negative patients, the following dosage guidelines apply for monotherapy with pantoprazole:
Duodenal ulcer. BTC Pantoprazole 40 mg should be given once a day. In most patients, freedom from symptoms is achieved rapidly and healing generally occurs within 2 weeks. If a 2-week period of treatment is not sufficient, healing will be achieved in almost all cases within a further 2 weeks.
Gastric ulcer. BTC Pantoprazole 40 mg should be given once a day. In most patients, freedom from symptoms is achieved rapidly and healing usually takes 4 weeks. If a 4-week period of treatment is not sufficient, healing will usually be achieved in a further 4 weeks.
Lesions refractory to H2-receptor antagonists. BTC Pantoprazole 40 mg should be given once a day. In most patients, freedom from symptoms is achieved rapidly and healing usually takes 4 weeks. If a 4-week period of treatment is not sufficient, healing is achieved in the majority of patients in a further 4 weeks. In a small group of patients, there may be benefit in extending pantoprazole therapy to a total of 12 weeks.
Zollinger-Ellison syndrome. The number of BTC Pantoprazole 40 mg tablets should be individually adjusted so that the acid output remains below 10 mmol/L. No fixed period of time is proposed for treatment of Zollinger-Ellison syndrome.
Gastroesophageal reflux disease (GORD).

Symptomatic GORD (treatment of symptomatic reflux).

The recommended dosage is one BTC Pantoprazole 20 mg tablet per day. If symptom control has not been achieved after four weeks treatment with pantoprazole 20 mg tablets daily, further investigation is recommended, for example endoscopy.

Treatment of reflux oesophagitis.

The recommended oral dosage is one BTC Pantoprazole 20 mg or 40 mg tablet per day. A 4 week period is usually required for healing, however if this is not sufficient, healing will usually be achieved within a further 4 weeks. This dosage may be increased up to 80 mg pantoprazole per day.

Maintenance of healed reflux oesophagitis in patients previously treated for moderate to severe reflux oesophagitis.

For long-term management, a maintenance dose of one BTC Pantoprazole 20 mg or 40 mg tablet per day is recommended, dependent upon patient response.

Prevention of gastroduodenal lesions and dyspeptic symptoms associated with non-selective non-steroidal anti-inflammatory drugs (NSAIDs) in increased risk patients with a need for continuous non-selective NSAID treatment.

The recommended oral dosage is one BTC Pantoprazole 20 mg tablet per day.

Dosage adjustment in:

Renal impairment.

The usual daily dose of 20 mg or 40 mg can be given. Combination therapy for eradication of H. pylori should not be used in patients with moderate to severe renal dysfunction, as no data are available on efficacy and safety in this population.

Hepatic impairment.

Combination therapy for eradication of H. pylori should not be used in patients with moderate to severe hepatic dysfunction, as no data are available on efficacy and safety in this population.
Pantoprazole is contraindicated in patients with cirrhosis or severe liver disease (see Section 4.3 Contraindications).
With milder forms of liver disease, the minimum effective dose has not been determined and the initial dose should be reduced.

Elderly.

The usual daily dose of 20 mg or 40 mg can be given. During combination therapy for the eradication of H. pylori, elderly patients should receive the recommended pantoprazole dose of 40 mg twice daily for a 1-week treatment period.

Infants and children.

There are no data currently available on the use of BTC Pantoprazole in children.

4.3 Contraindications

Known hypersensitivity to pantoprazole, substituted benzimidazoles or any components of the formulation.
Cases of cirrhosis or severe liver disease.
Combination therapy for eradication of H. pylori is contraindicated in patients with known hypersensitivity to any of the antibiotics proposed for combination therapy for eradication of H. pylori or in patients with moderate to severe hepatic or renal dysfunction. The product information for the individual components of the combination H. pylori eradication therapy should be consulted for any further contraindications.
Pantoprazole, like other proton pump inhibitors, should not be co-administered with HIV protease inhibitors, such as atazanavir or nelfinavir (see Section 4.5 Interactions with Other Medicines and Other Forms of Interactions).

4.4 Special Warnings and Precautions for Use

Check the following before use.

In the case of combination therapy for the eradication of H. pylori, the product information for the antibiotics used in the combination should be observed.
In the presence of any alarm symptoms (e.g. significant unintentional weight loss, recurrent vomiting, dysphagia, haematemesis, anaemia or melaena) and when gastric ulcer is suspected or present, malignancy should be excluded, as treatment with pantoprazole may alleviate symptoms and delay diagnosis. Further investigation is to be considered if symptoms persist despite adequate treatment.

Clostridium difficile.

PPI therapy may be associated with an increased risk of Clostridium difficile infection.
Pantoprazole, like all proton pump inhibitors, might be expected to increase the counts of bacteria normally present in the upper gastrointestinal tract. Treatment with pantoprazole may lead to a slightly increased risk of gastrointestinal infections caused by bacteria such as Salmonella, Campylobacter and Clostridium difficile.

Influence on vitamin B12 absorption.

Pantoprazole, as all acid-blocking medicines, may reduce the absorption of cyanocobalamin (vitamin B12) due to hypo- or achlorhydria. This should be considered in patients with reduced body stores or risk factors for reduced vitamin B12 absorption (such as the elderly) on long-term therapy and in patients with Zollinger-Ellison syndrome and other pathological hypersecretory conditions requiring long-term treatment if respective clinical symptoms are observed. Rare cases of cyanocobalamin (vitamin B12) deficiency following acid-blocking therapy have been reported.

Non-steroidal anti-inflammatory drugs.

Use of pantoprazole 20 mg for prevention of gastroduodenal lesions and dyspeptic symptoms associated with non-selective non-steroidal anti-inflammatory drugs (NSAIDs) should be restricted to patients who require continued non-selective NSAID treatment and have an increased risk to develop gastrointestinal complications. The increased risk should be assessed according to individual risk factors, e.g. high age (> 65 years), history of gastric or duodenal ulcer or upper gastrointestinal bleeding.

Severe cutaneous adverse reactions.

Severe cutaneous adverse reactions, including erythema multiforme, Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), drug reaction with eosinophilia and systemic symptoms (DRESS), and acute generalized exanthematous pustulosis (AGEP) have been reported in association with the use of PPIs (see Section 4.8 Adverse Effects (Undesirable Effects)). Discontinue pantoprazole at the first signs or symptoms of severe cutaneous adverse reactions or other signs of hypersensitivity and consider further evaluation.

Subacute cutaneous lupus erythematosus (SCLE).

Proton pump inhibitors are associated in rare cases with the occurrence of subacute cutaneous lupus erythematosus (SCLE). If lesions occur, especially in sun-exposed areas of the skin, and if accompanied by arthralgia, the patient should seek medical help promptly and the health care professional should consider stopping pantoprazole.

Bone fracture.

PPI therapy may be associated with an increased risk for osteoporosis-related fractures of the hip, wrist, or spine. The risk of fracture was increased in patients who received high-doses; defined as multiple daily doses, and long-term PPI therapy (a year or longer).

Acute interstitial nephritis.

Acute interstitial nephritis has been observed in patients taking PPIs including pantoprazole. Acute interstitial nephritis may occur at any point during PPI therapy and is generally associated to an idiopathic hypersensitivity reaction. Discontinue pantoprazole if acute interstitial nephritis develops.

Hypomagnesaemia.

Hypomagnesaemia has been rarely reported in patients treated with PPIs for at least three months (in most cases after a year of therapy). Serious consequences of hypomagnesaemia include tetany, arrhythmia, and seizure. Hypomagnesaemia may lead to hypocalcaemia and/or hypokalemia (see Section 4.8 Adverse Effects (Undesirable Effects)).

General toxicity.

Gastrointestinal system.

Treatment with pantoprazole causes dose-dependent hypergastrinaemia as a result of inhibition of gastric acid secretion. Gastrin has a trophic effect on the gastric mucosa, and increases in gastric weight have been observed in rats and dogs to be dependent upon both dose and duration of treatment. Accompanying histopathological changes in the gastric mucosa were increased height, dilatation of fundic glands, chief cell hyperplasia and/or atrophy and parietal cell hyperplasia or vacuolation/degeneration. Increased density of enterochromaffin-like (ECL) cells was observed after 12 months treatment at dose levels from 5 mg/kg/day in rats and 2.5 mg/kg/day in dogs; all changes were reversible after various recovery periods. Since these gastric effects are a consequence of the pharmacological effect of acid secretion inhibition, no-effect doses were not established in all instances.
Although rats might be more susceptible to this effect than other species because of their high ECL cell density and sensitivity to gastrin, ECL cell hyperplasia occurs in other species, including mice and dogs, and has been observed in one of two clinical trials in which ECL cell density was measured (a 2-fold increase was observed in study RR126/97 after up to 5 years of treatment with regular and high doses, but no increase was observed in study RR125/97). No dysplasic or neoplastic changes were observed in gastric endocrine cells in either study.

Ocular toxicity and dermal phototoxicity/sensitivity.

Studies have shown that pantoprazole is retained in low levels in the eyes and skin of pigmented rats. It is likely that the retention reflects a reversible association with melanin. Animal studies investigating the potential for phototoxicity/photosensitivity have not been conducted. A 2-week dog study, conducted specifically to investigate the effects on the eye and ear, did not reveal any changes relating to pantoprazole treatment, but the doses chosen were relatively low (40 and 160 mg (about 4 and 15 mg/kg) orally and 60 mg (about 6 mg/kg) IV). No ophthalmological changes or changes in electroretinographs were observed in cynomolgus monkeys at IV doses of up to 15 mg/kg/day for 4 weeks.

Monitoring advice.

In long-term treatment, especially when exceeding a treatment period of 1 year, patients should be kept under regular surveillance.
Patients being treated for symptomatic GORD with BTC Pantoprazole 20 mg who do not respond after 4 weeks should be investigated.

Use in the elderly.

No dose adjustment is necessary in elderly patients (see Section 4.2 Dose and Method of Administration, Use in the elderly; Section 4.4 Special Warnings and Precautions for Use, Influence on vitamin B12 absorption; Section 5.2 Pharmacokinetic Properties, Special populations).

Paediatric use.

To date there is insufficient experience with treatment in children under 5 to justify a general recommendation.

Effects on laboratory tests.

During treatment with antisecretory medicinal products, serum gastrin increases in response to the decreased acid secretion. Also Chromogranin A (CgA) increases due to decreased gastric acidity. The increased CgA level may interfere with investigations for neuroendocrine tumours.
To avoid this interference, proton pump inhibitor treatment should be stopped 14 days before CgA measurements. This is to allow CgA levels that might be spuriously elevated following PPI treatment to return to reference range.

4.5 Interactions with Other Medicines and Other Forms of Interactions

Pantoprazole is metabolised in the liver via the cytochrome P450 enzyme system. A study using human liver microsomes suggested that the P450 enzymes CYP2C19 and CYP3A4 are involved in its metabolism. In addition, CYP2D6 and CYP2C9-10 were implicated in another study. An interaction of pantoprazole with other drugs or compounds, which are metabolised using the same enzyme system, cannot be excluded. However, no clinically significant interactions were observed in specific tests with a number of such drugs or compounds, namely carbamazepine, caffeine, diazepam, diclofenac, digoxin, ethanol, glibenclamide, metoprolol, naproxen, nifedipine, phenytoin, piroxicam, theophylline, and the low dose oral contraceptive Triphasil (levonorgestrel and ethinyloestradiol). There was also no interaction with a concomitantly administered antacid (aluminium hydroxide and magnesium hydroxide).
Treatment of dogs with IV famotidine shortened the duration of the pH elevation effect of pantoprazole.
Four crossover pharmacokinetic studies designed to examine any interactions between pantoprazole and the drugs clarithromycin, amoxicillin and metronidazole, conducted in 66 healthy volunteers, showed no interactions.

Drugs with pH-dependent absorption pharmacokinetics.

As with all acid suppressant medications, the absorption of drugs whose bioavailability is pH dependent (e.g. ketoconazole, itraconazole, posaconazole, erlotinib), might be altered due to the decrease in gastric acidity.

HIV protease inhibitors.

It has been shown that co-administration of atazanavir 300 mg/ritonavir 100 mg with omeprazole (40 mg once daily) or atazanavir 400 mg with lansoprazole (60 mg single dose) to healthy volunteers resulted in a substantial reduction in the bioavailability of atazanavir. The absorption of atazanavir is pH dependent. Therefore, proton pump inhibitors, including pantoprazole, should not be co-administered with HIV protease inhibitors for which absorption is dependent on acidic intragastric pH, such as atazanavir or nelfinavir (see Section 4.3 Contraindications).

Mycophenolate mofetil.

Co-administration of PPIs in healthy subjects and in transplant patients receiving mycophenolate mofetil has been reported to reduce the exposure to the active metabolite, mycophenolic acid. This is possibly due to a decrease in mycophenolate mofetil solubility at an increased gastric pH. The clinical relevance of reduced mycophenolic acid exposure on organ rejection has not been established in transplant patients receiving PPIs and mycophenolate mofetil. Use pantoprazole with caution in transplant patients receiving mycophenolate mofetil.

Methotrexate.

Concomitant use of proton pump inhibitors with methotrexate (primarily at high dose), may elevate and prolong serum levels of methotrexate and/or its metabolite hydroxymethotrexate, possibly leading to methotrexate toxicities.

Drugs that inhibit or induce CYP2C19 (tacrolimus, fluvoxamine).

Concomitant administration of pantoprazole and tacrolimus may increase whole blood levels of tacrolimus, especially in transplant patients who are intermediate or poor metabolisers of CYP2C19. Inhibitors of CYP2C19, such as fluvoxamine, would likely increase the systemic exposure of pantoprazole.

Coumarin anticoagulants (phenprocoumon or warfarin).

Co-administration of pantoprazole with warfarin or phenprocoumon did not affect the pharmacokinetics of warfarin, phenprocoumon or international normalised ratio (INR). However, there have been reports of increased INR and prothrombin time in patients receiving PPIs and warfarin or phenprocoumon concomitantly. Increases in INR and prothrombin time may lead to abnormal bleeding, and even death. Therefore, in patients being treated with coumarin anticoagulants (e.g. warfarin or phenprocoumon), monitoring of prothrombin time/ INR is recommended after initiation, termination or during irregular use of pantoprazole.

4.6 Fertility, Pregnancy and Lactation

Effects on fertility.

Pantoprazole at oral doses up to 500 mg/kg/day in male rats and 450 mg/kg/day in female rats (estimated exposure at least 60-fold the clinical exposure from the 40 mg tablet) was found to have no effect on fertility and reproductive performance.
(Category B3)
Teratological studies in rats and rabbits gave no evidence of a teratogenic potential for pantoprazole. In oral rat studies, dose-dependent toxic effects were observed on foetuses and pups: increased pre- and postnatal deaths at 450 mg/kg/day (AUC exposure approximately 60-times the clinical exposure of the 40 mg oral dose) reduced foetal weight at ≥ 150 mg/kg/day (AUC exposure approximately 18-fold clinical exposure) and delayed skeletal ossification and reduced pup growth at ≥ 15 mg/kg/day (approximately clinical exposure). For the latter a no-effect dose of 5 mg/kg was established. Doses of 450 mg/kg/day were maternotoxic and may have been associated with dystocia and incomplete parturition. Penetration of the placenta was investigated in the rat and was found to increase with advanced gestation. As a result, concentrations of pantoprazole in the foetus are increased shortly before birth regardless of the route of administration.
The significance of these findings in humans is unclear. As there is no information on the safety of the drug during pregnancy in women, pantoprazole should not be used during pregnancy, unless the benefit clearly outweighs the potential risk to the foetus.
 A peri/post-natal study in rats found that treatment with pantoprazole at doses of 10 mg/kg/day (AUC exposure approximately the clinical exposure of the 40 mg oral dose) or greater decreased pup growth. A transient effect on one of a series of development tests (startle response) was only evident in the 30 mg/kg/day (AUC exposure approximately 3-fold the clinical exposure) group at an age when male and female offspring showed lower body weights, paralleled with lower brain weight, than the controls. The significance of these findings for humans is unknown, and there is currently no information on the safety of pantoprazole during breast-feeding in humans. Excretion into human milk has been reported. Therefore, pantoprazole should only be used during lactation if the benefits clearly outweigh the risks.

4.7 Effects on Ability to Drive and Use Machines

Pantoprazole does not exert its pharmacological action centrally, therefore it is not expected to adversely affect the ability to drive or use machines, however, adverse drug reactions such as dizziness and visual disturbances may occur (see Section 4.8 Adverse Effects (Undesirable Effects)). If affected, patients should not drive or operate machines.

4.8 Adverse Effects (Undesirable Effects)

Pantoprazole tablets are well tolerated. Most of the adverse reactions seen with treatment were of mild or moderate intensity. The following adverse reactions have been reported in patients receiving pantoprazole alone or in combination with antibiotics for H. pylori eradication in clinical trials and post-marketing surveillance.
Adverse reactions within each body system are listed in descending order of frequency (very common: ≥ 10%; common: ≥ 1% and < 10%; uncommon: ≥ 0.1% and < 1%; rare ≥ 0.01% and < 0.1%; very rare: < 0.01%, not known: cannot be estimated from the available data). These include the following:

General disorders and administration site conditions.

Uncommon: fatigue and malaise, asthenia and increased sweating.
Rare: fever, peripheral oedema and increased body temperature.
Very rare: flushing, substernal chest pain, and hot flushes.

Cardiovascular disorders, general.

Rare: hypertension.
Very rare: circulatory collapse.

Nervous system disorders.

Uncommon: headache, dizziness.
Rare: taste disorders, metallic taste.
Very rare: reduced movement and speech disorder, changes to the senses of smell and taste.
Not known: paraesthesia.

Gastrointestinal system disorders.

Common: fundic gland polyps (benign).
Uncommon: diarrhoea, nausea/ vomiting, abdominal distension and bloating, constipation, dry mouth, abdominal pain and discomfort.
Rare: rectal disorder and colonic polyp.
Very rare: faecal discolouration and increased saliva.
Not known: severe eructation, withdrawal of long-term PPI therapy can lead to aggravation of acid-related symptoms and may result in rebound acid hypersecretion.

Hearing and vestibular disorders.

Very rare: tinnitus.

Immune system disorders.

Rare: hypersensitivity (including anaphylactic reactions and anaphylactic shock).

Hepatobiliary disorders.

Uncommon: liver enzymes increased (transaminases, gamma-GT).
Rare: bilirubin increased.
Very rare: hepatic failure, cholestatic hepatitis, jaundice.
Not known: hepatocellular injury.
The occurrence of severe hepatocellular damage leading to jaundice or hepatic failure having a temporal relationship to the intake of pantoprazole has been reported with a frequency of approximately one in a million patients.

Metabolic and nutrition disorders.

Rare: hyperlipidaemias and lipid increases (triglycerides, cholesterol), weight changes.
Not known: hyponatraemia, hypomagnesaemia, hypocalcaemia, hypokalemia (hypocalcaemia and/or hypokalemia may be related to the occurrence of hypomagnesaemia (see Section 4.4 Special Warnings and Precautions for Use).

Musculoskeletal and connective tissue disorders.

Rare: arthralgia, myalgia.
Very rare: pain including skeletal pain.
Not known: muscle spasm as a consequence of electrolyte disturbances, fracture of wrist, hip and spine.

Renal and urinary disorders.

Very rare: tubulointerstitial nephritis (TIN) (with possible progression to renal failure).

Platelet, bleeding, clotting disorders.

Very rare: increased coagulation time.

Psychiatric disorders.

Uncommon: sleep disorders.
Rare: depression (and all aggravations), hallucination, disorientation (and all aggravations) and confusion, especially in pre-disposed patients, as well as the aggravation of these symptoms in case of pre-existence.
Very rare: anxiety.

Blood and lymphatic system disorders.

Rare: anaemia, agranulocytosis.
Very rare: leukopenia, thrombocytopenia, pancytopenia.

Resistance mechanism disorders.

Rare: sepsis.

Respiratory system disorders.

Very rare: dyspnoea.

Reproductive system and breast disorders.

Rare: gynaecomastia.

Skin and subcutaneous tissue disorders.

Uncommon: pruritus, rash/ exanthema/ eruption.
Rare: angioedema, urticaria.
Very rare: flushing, severe skin reactions such as Stevens-Johnson syndrome, toxic epidermal necrolysis, erythema multiforme, Lyell syndrome and photosensitivity.
Not known: subacute cutaneous lupus erythematosus, drug reaction with eosinophilia and systemic symptoms (DRESS), acute generalised exanthematous pustulosis.

Eye disorders.

Uncommon: visual disturbances (blurred vision).
Very rare: conjunctivitis.
See Tables 1 and 2.

Reporting suspected adverse effects.

Reporting suspected adverse reactions after registration of the medicinal product is important. It allows continued monitoring of the benefit-risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions at www.tga.gov.au/reporting-problems.

4.9 Overdose

There are no known symptoms of overdosage in humans. In individual cases, 240 mg was administered i.v .or p.o. and was well tolerated. Standard detoxification procedures apply. Standard detoxification procedures apply. As pantoprazole is extensively protein bound, it is not readily dialyzable. As in any case of overdosage, treatment should be symptomatic and supportive measures should be utilised.
For information on the management of overdose, contact the Poisons Information Centre on 131126 (Australia).

5 Pharmacological Properties

Pantoprazole is a substituted benzimidazole, which inhibits basal and stimulated gastric secretion.

5.1 Pharmacodynamic Properties

Mechanism of action.

Pantoprazole is a proton pump inhibitor (PPI). It inhibits specifically and dose-proportionately H+/K+-ATPase, the enzyme, which is responsible for gastric acid secretion in the parietal cells of the stomach.
The substance is a substituted benzimidazole, which accumulates in the acidic environment of the parietal cells after absorption. There, it is converted into the active form, a cyclic sulphenamide, which binds to the H+/K+-ATPase, thus inhibiting the proton pump and causing potent and long-lasting suppression of basal and stimulated gastric acid secretion. As pantoprazole acts distal to the receptor level, it can influence gastric acid secretion irrespective of the nature of the stimulus (acetylcholine, histamine, gastrin).
Pantoprazole's selectivity is due to the fact that it only exerts its full effect in a strongly acidic environment (pH < 3), remaining mostly inactive at higher pH values. As a result, its complete pharmacological, and thus therapeutic effect, can only be achieved in the acid-secretory parietal cells. By means of a feedback mechanism, this effect is diminished at the same rate as acid secretion is inhibited.
As with other proton pump inhibitors and H2 receptor inhibitors, treatment with pantoprazole causes a reduced acidity in the stomach and thereby an increase in gastrin in proportion to the reduction in acidity. The increase in gastrin is reversible.

Clinical trials.

Clinical trials in adults. Helicobacter pylori (H. pylori) is associated with duodenal and gastric ulcer disease in about 95 and 70% of patients, respectively. H. pylori is the major factor in the development of gastritis and ulcers in such patients. Recent evidence also suggests a causative link between H. pylori and gastric carcinoma. An attempt to eradicate H. pylori is recommended in most patients with duodenal and gastric ulcer where the latter is not caused by NSAID ingestion (see Section 4.2 Dose and Method of Administration). In an experimental study in mice, pantoprazole at a dose of 100 mg/kg t.i.d. increased the inhibitory potency of amoxicillin, clarithromycin and tetracycline against Helicobacter felis.
Eradication of H. pylori. The clinical trial program of pantoprazole for eradication of H. pylori has investigated four therapy combinations. A summary of the clinical trials is provided in Tables 3 and 4.
Treatment of symptomatic reflux (GORD). The relief of symptoms of reflux in patients who showed no oesophageal lesions on endoscopy has been shown in the following double blind, multi-centre, placebo controlled study (245/98) using pantoprazole 20 mg once daily. Overall, 219 patients were enrolled into the study. Each patient was to have a normal oesophagus as assessed by endoscopy and to have suffered from at least one episode of heartburn of at least moderate intensity on all three days prior to inclusion into the study. Additionally, patients were to have a history of reflux symptoms (heartburn, acid eructation, pain on swallowing) for at least 3 months prior to entry into the study. Efficacy of pantoprazole 20 mg is shown in Table 5.
Acute treatment of mild reflux oesophagitis. In two randomised, double-blind, multi-centre studies (BGSA006 and FK3034) 410 patients with mild GORD (Savary-Miller stage 1) were treated with either pantoprazole 20 mg once daily before breakfast or ranitidine 300 mg once daily at bedtime. Superiority of pantoprazole 20 mg in terms of healing rates as compared to ranitidine after 4 and 8 weeks is shown in Table 6. The difference in healing rates was statistically significant at all-time points in the intention-to-treat and per protocol patient groups.
Maintenance of healed reflux oesophagitis in patients previously treated for moderate to severe reflux oesophagitis. Three randomised, double-blind, parallel-group trials examined the efficacy of pantoprazole in the maintenance of healed reflux oesophagitis in patients aged 18-88 years treated for moderate to severe reflux oesophagitis over 12 months. The primary endpoint was time to endoscopically confirmed relapse; however, the median was not reached in the pantoprazole groups at the end of 12 months. Table 7 lists the results for the incidence of relapse, in patients with data from at least one follow-up visit.
Pantoprazole 20 mg and 40 mg/day doses were therapeutically equivalent based on the pre-defined equivalence criterion of the 90% confidence interval of the difference between doses being within ± 20%.
Four uncontrolled trials with varying periods of follow-up support the long-term efficacy of pantoprazole 40-80 mg/day in the maintenance of healed reflux oesophagitis in patients previously treated for moderate to severe reflux oesophagitis. Two of the trials included patients with gastric and duodenal ulcer. The incidence of relapse at 1 year was 12-15%, 2 years 22-25% and 6 years 40%.
Safety data is available from the 1584 patients involved in the 7 long-term clinical studies. 904 patients have been treated with pantoprazole for at least 1 year, and 273, 112, 68, 47 and 17 have been treated for at least 2, 3, 4, 5 and 6 years, respectively. In total, 108 (6.8%) patients experienced serious adverse events (EC definition), of which all but 6 were classified as being causally unrelated to pantoprazole (4 cases with 40 mg pantoprazole: colonic polyp; abdominal pain and rectal disorder; diarrhoea and abdominal pain, sepsis versus 2 cases with high-dose pantoprazole: anaemia and hypertension (see Section 4.8 Adverse Effects (Undesirable Effects)). Additionally, in the open on-going studies, patients were assessed by biopsy and no evidence of dysplastic or neoplastic endocrine growth was found.
Prevention of gastroduodenal lesions and dyspeptic symptoms associated with non-selective non-steroidal anti-inflammatory drugs (NSAIDs) in increased risk patients with a need for continuous non-selective NSAID treatment. Two randomised, double-blind, multicentre studies (205/2000 and 129/2000) examined the efficacy and safety of pantoprazole in the prevention of NSAID-associated gastroduodenal ulcers, petechiae, erosions and dyspeptic symptoms in patients with arthritis on continuous treatment with NSAIDs and an increased risk to develop gastrointestinal lesions.
The primary endpoint for both studies was the "therapeutic failure" rate after 6 months, defined as "endoscopic failure" (i.e. more than 10 erosions or petechiae, peptic ulcer, reflux oesophagitis) or premature study termination due to at least likely related adverse event or due to severe gastrointestinal symptoms.

Study 205/2000.

A total of 515 patients were included into the study. Patients were randomised to receive either pantoprazole 20 mg daily (n = 257) or misoprostol 200 microgram twice daily (n = 258). Efficacy of pantoprazole 20 mg is shown in Table 8.
Pantoprazole 20 mg once daily was statistically significantly superior to misoprostol 200 microgram twice daily with regard to "therapeutic failure" and to "endoscopic failure". Reflux oesophagitis was included as an efficacy end-point in the study, which may have biased the results in favour of pantoprazole. A causal association between NSAIDs and reflux oesophagitis has not been established. In addition, proton pump inhibitors such as pantoprazole have documented beneficial treatment effects on reflux oesophagitis while misoprostol (a prostaglandin E1 analogue) has negligible therapeutic effects.

Study 129/2000.

A total of 595 patients were included into the study. Patients were randomised to receive either pantoprazole 20 mg daily (n = 196), pantoprazole 40 mg daily (n = 199) or omeprazole 20 mg daily (n = 200). Efficacy results are shown in Table 9.
All three treatments, 20 mg pantoprazole, 40 mg pantoprazole and 20 mg omeprazole, were proven to be of equivalent and high efficacy.

5.2 Pharmacokinetic Properties

Absorption.

Adults.

After administration of enteric-coated tablets, pantoprazole is rapidly absorbed and the maximal plasma concentration appears after one single oral dose. After single and multiple oral doses, the median time to reach maximum serum concentrations was approximately 2.5 h, with a Cmax of approximately 1.2 microgram/mL. Terminal half-life is approximately 1 h. Pharmacokinetics do not vary after single or repeated administration. The plasma kinetics of pantoprazole are linear (in the dose range of 10 to 80 mg) after both oral and intravenous administration.
Pantoprazole is completely absorbed after oral administration. The absolute bioavailability of the tablet is approximately 77%. Concomitant intake of food had no influence on AUC, Cmax and thus bioavailability.
Following oral administration of BTC Pantoprazole 40 mg to healthy subjects under fasting conditions, a mean peak plasma concentration (Cmax) of pantoprazole of approximately 2459.7 nanogram/mL was achieved within approximately 3.07 hours (Tmax).
Following oral administration of BTC Pantoprazole 40 mg to healthy subjects under fed conditions, a mean peak plasma concentration (Cmax) of pantoprazole of approximately 2685.9 nanogram/mL was achieved within approximately 6.48 hours (Tmax).

Distribution.

The serum protein binding of pantoprazole is approximately 98%. Volume of distribution is approximately 0.15 L/kg and clearance is approximately 0.1 L/h/kg.

Metabolism.

Pantoprazole is extensively metabolised in the liver through the cytochrome P450 (CYP) system. Pantoprazole metabolism is independent of the route of administration (intravenous or oral). The main metabolic pathway is demethylation, by CYP2C19, with subsequent sulfation; other metabolic pathways include oxidation by CYP3A4. There is no evidence that any of the pantoprazole metabolites have significant pharmacologic activity. CYP2C19 displays a known genetic polymorphism due to its deficiency in some sub-populations (e.g. 3% of Caucasians and African-Americans and 17-23% of Asians). Although these sub-populations of slow pantoprazole metabolisers have elimination half-life values of 3.5 to 10.0 hours, they still have minimal accumulation (≤ 23%) with once daily dosing.

Excretion.

Pantoprazole is rapidly eliminated from serum and is almost exclusively metabolised in the liver. Renal elimination represents the most important route of excretion (approximately 80%) for the metabolites of pantoprazole, the rest are excreted with the faeces. The main metabolite in both the serum and urine is desmethyl-pantoprazole, which is conjugated with the sulphate. The half-life of the main metabolites (approximately 1.5 h) is not much longer than that of pantoprazole.

Special populations.

In patients with liver cirrhosis given a single 40 mg tablet, the half-life increases to between 7 and 9 h and the AUC values are increased by a factor of 6-8 but the maximum serum concentration increases only slightly by a factor of 1.5 in comparison with healthy subjects. After a single 20 mg tablet, AUC increased 3-fold in patients with mild hepatic impairment and 5-fold in patients with severe hepatic impairment compared with healthy controls. Mean elimination half-life was 3.3 h in mild hepatic impairment and 6.0 h in severe hepatic impairment compared with 1.1 h in controls. The maximum serum concentration only increased slightly by a factor of 1.3 compared with healthy subjects.
In patients with renal impairment (including those undergoing dialysis) no dose reduction is required. Although the main metabolite is moderately increased, there is no accumulation. The half-life of pantoprazole is as short as in healthy subjects. Pantoprazole is poorly dialyzable.
The slight increase in AUC and Cmax in elderly volunteers compared with their younger counterparts is also not clinically relevant.

5.3 Preclinical Safety Data

Genotoxicity.

A number of in vitro and in vivo genotoxicity assays covering mutagenicity, clastogenicity and DNA damage end-points were conducted on pantoprazole and the results were generally negative. Exposures achieved in the in vivo tests in mice and rats were well in excess of exposures expected clinically. However, pantoprazole was clearly positive in carefully conducted cytogenetic assays in human lymphocytes in vitro, both in the presence and absence of metabolic activation. Omeprazole was also positive in a comparable test conducted in the same laboratory, suggesting a possible class effect. A minute amount of radioactivity was bound to rat hepatic DNA after treatment with 200 mg/kg/day pantoprazole for 14 days. This is an estimated exposure 24-fold the clinical exposure from the 40 mg tablet. No distinct DNA-adduct has been detected.
Pantoprazole was found to be negative in the following studies: in vivo chromosome aberration assay in rat and bone marrow (126E/95), mouse lymphoma test (222E/95) and a gene mutation test in Chinese hamster ovary cells (in vitro) (188E/95). In addition, toxicokinetic studies were conducted in rats at the doses used in the bone marrow assay (50 to 1200 mg/kg) (56E/96) and in mice at the high dose from the earlier micronucleus test (710 mg/kg) (89E/96). Pantoprazole exposure was high with the respective rat and mouse plasma AUCs being 7 to 100 and 9- to 12-fold the clinical exposure from a 40 mg tablet.

Carcinogenicity.

In a two year oral carcinogenicity study in Sprague Dawley rats at doses up to 200 mg/kg/day gastric carcinoids were found after pantoprazole treatment at doses greater than 0.5 mg/kg/day in females and greater than 5 mg/kg/day in males, with none observed in controls. The estimated exposure (based on AUC) from these doses are at, or below, clinical exposure from a 40 mg tablet. The development of gastric tumours is attributed to chronic elevation of serum gastrin levels with associated histopathological changes in the gastrointestinal system.
In both male and female rats, the development of hepatocellular adenomas was increased at doses greater than 5 mg/kg/day and the development of hepatocellular carcinomas was increased at doses greater than 50 mg/kg/day, with respective estimated exposures of 1- and 9-fold the AUC of the 40 mg clinical dose. Hepatocellular tumours, which were also observed in female mice at oral doses greater than 25 mg/kg/day (exposure similar to clinical exposure), may be associated with pantoprazole-induced increases in hepatic enzyme activity.
Treatment with pantoprazole at doses greater than 50 mg/kg/day (exposure approximately 9-fold clinical exposure) also increased the development of thyroid follicular cell adenomas in male and female rats. Several studies in rats were conducted to investigate the effect of pantoprazole on the thyroid, the results of which suggested that the effect may be secondary to the induction of enzymes in the liver.
In a more recent carcinogenicity study, Fischer rats were studied using lower doses (5, 15 and 50 mg/kg, 0.5-, 2- and 7-fold the clinical AUC, respectively). Gastric carcinoids were detected at all doses in females and at the 15 and 50 mg/kg doses in males, while none were detected in controls. No metastases of these carcinoids were detected. There was no increase in incidence of liver tumours. The dose of 15 mg/kg is seen to be the no-effect level for liver tumours in rodents.
Consideration of the possible mechanisms involved in the development of the above drug-related tumour types suggests that it is unlikely that there is any carcinogenic risk in humans at therapeutic dose levels of pantoprazole for short term treatment.

6 Pharmaceutical Particulars

6.1 List of Excipients

In addition to pantoprazole sodium sesquihydrate, these tablets also contain sodium carbonate, microcrystalline cellulose, crospovidone, hyprolose, colloidal anhydrous silica, calcium stearate, Opadry complete film coating system 03B22011 Yellow, Eudragit L30D-55, and triethyl citrate.

6.2 Incompatibilities

Incompatibilities were either not assessed or not identified as part of the registration of this medicine.
For information on interactions with other medicines and other forms of interactions, see Section 4.5 Interactions with Other Medicines and Other Forms of Interactions.

6.3 Shelf Life

In Australia, information on the shelf life can be found on the public summary of the Australian Register of Therapeutic Goods (ARTG). The expiry date can be found on the packaging.

6.4 Special Precautions for Storage

Store below 25°C.

6.5 Nature and Contents of Container

BTC Pantoprazole 20 mg tablets are available in PA/Al/PVC/Al blister packs of 30 tablets.
BTC Pantoprazole 40 mg tablets are available in PA/Al/PVC/Al blister packs of 5 or 30 tablets.
Not all pack sizes may be marketed.

6.6 Special Precautions for Disposal

In Australia, any unused medicine or waste material should be disposed of in accordance with local requirements.

6.7 Physicochemical Properties

Pantoprazole sodium sesquihydrate is a white to off-white crystalline powder. Solubility is low at neutral pH and increases with increasing pH.

Chemical structure.


Chemical name: 5-(Difluoromethoxy)-2-[[(3,4-dimethoxy-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole, sodium salt, sesquihydrate.
Molecular formula: C16H14F2N3NaO4S.1.5H2O.
Molecular weight: 432.4.

CAS number.

164579-32-2.

7 Medicine Schedule (Poisons Standard)

S4 - Prescription Only Medicine.

Summary Table of Changes