Consumer medicine information

Furosemide-Baxter

Furosemide (frusemide)

BRAND INFORMATION

Brand name

Furosemide-Baxter

Active ingredient

Furosemide (frusemide)

Schedule

S4

 

Consumer medicine information (CMI) leaflet

Please read this leaflet carefully before you start using Furosemide-Baxter.

SUMMARY CMI

FUROSEMIDE-BAXTER

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 Furosemide-Baxter?

Furosemide-Baxter contains the active ingredient Furosemide. Furosemide-Baxter is a diuretic which helps reduce the amount of excess fluid in the body by increasing the amount of urine produced.

For more information, see Section 1. Why am I using Furosemide-Baxter? in the full CMI.

2. What should I know before I use Furosemide-Baxter?

Do not use if you have ever had an allergic reaction to Furosemide-Baxter 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 Furosemide - Baxer? in the full CMI.

3. What if I am taking other medicines?

Some medicines may interfere with Furosemide-Baxter 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 Furosemide-Baxter?

  • Furosemide-Baxter solution for injections are normally administered to you by doctors or nurses in hospital

More instructions can be found in Section 4. How do I use Furosemide-Baxter? in the full CMI.

5. What should I know while using Furosemide-Baxter?

Things you should do
  • Remind any doctor, dentist or pharmacist you visit that you are using Furosemide-Baxter.
  • Make sure you drink enough water during any exercise and during hot weather when you are using Furosemide-Baxter, especially if you sweat a lot
Things you should not do
  • Women must not breast feed while being treated with furosemide.
Driving or using machines
  • Furosemide-Baxter may cause dizziness or light-headedness in some people. If this happens, do not drive or operate machines
Drinking alcohol
  • It is not recommended that you drink alcohol while using Furosemide-Baxter
Looking after your medicine
  • Furosemide-Baxter will be stored in the hospital pharmacy or in the ward. It will be kept in original packaging below 25°C, protected from light.

For more information, see Section 5. What should I know while using Furosemide-Baxter? in the full CMI.

6. Are there any side effects?

Some of the common and less serious side effects are dry mouth, blurred vision, spasms, headache, numbness in hands/ feet, light-headedness, diarrhea and unusual bleeding or bruising under the skin. Some of the uncommon/ rare and serious side effects are chest pain, sudden signs of allergy, fainting, lockjaw, yellowing of skin/ eyes, irregular or fast heartbeat, deafness, passing less urine than normal, increased sensitivity to sunlight and loss of control of your bladder or bowels.

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

FUROSEMIDE-BAXTER

Active ingredient(s): Furosemide


Consumer Medicine Information (CMI)

This leaflet provides important information about using Furosemide-Baxter. 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 Furosemide-Baxter.

Where to find information in this leaflet:

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

1. Why am I using Furosemide-Baxter?

Furosemide-Baxter contains the active ingredient Furosemide. Furosemide-Baxter is a diuretic. A diuretic helps reduce the amount of excess fluid in the body by increasing the amount of urine produced.

Furosemide-Baxter is used to treat swelling of the ankles, feet, legs or even the brain or lungs. This swelling is called edema and can occur in some heart, lung, liver or kidney conditions.

Furosemide-Baxter may be used in some patients with more serious kidney problems who may have some fluid retention.

Furosemide-Baxter may be given alone or in combination with other medicines to treat your condition.

Your doctor may have prescribed Furosemide-Baxter for another purpose.

Ask your doctor if you have any questions about why it has been prescribed for you.

This medicine is only available with a doctor's prescription. This medicine is not addictive.

2. What should I know before I use Furosemide-Baxter?

Warnings

Do not use Furosemide-Baxter if:

  • certain liver and kidney problems
  • no production or no passing of urine
  • low blood pressure (hypotension)
  • low sodium levels in your blood
  • low potassium levels in your blood
  • dehydration
  • jaundice or history of jaundice in newborns or infants
  • hepatic coma or precoma

Do not use Furosemide-Baxter if you are allergic to:

  • furosemide, or any of the ingredients listed at the end of this leaflet.
  • medicines called sulfonamides (e.g. some types of antibiotics which are also referred to as ‘sulfur antibiotics’) or sulfonylureas which are medicines which can be used to treat diabetes.
    Some symptoms of an allergic reaction include skin rash, itching, shortness of breath or swelling of the face, lips or tongue, which may cause difficulty in swallowing or breathing.

Do not use Furosemide-Baxter if you are pregnant.

Do not use Furosemide-Baxter if you are breastfeeding or planning to breast-feed.

The active drug, furosemide, passes into breast milk and there is a possibility your baby may be affected.

Do not use Furosemide-Baxter after the expiry date (EXP) printed on the pack.

If you use it after the expiry date has passed, it may not work as well.

Do not use the medicine if the packaging is torn or shows signs of tampering.

Check with your doctor if you:

  • any of the ingredients listed at the end of this leaflet
  • any other medicines called sulfonamides or sulfonylureas
  • any other substances, such as foods, preservatives or dyes

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

Tell your doctor if you have or have had any medical conditions especially the following:

  • liver problems
  • kidney problems
  • heart problems
  • high cholesterol levels
  • asthma
  • diabetes
  • gout, a disease with painful, swollen joints
  • passing less urine than is normal for you
  • difficulty passing urine
  • no production or no passing of urine
  • prostate problems
  • Systemic Lupus Erythematosus (SLE), a disease affecting the skin, joints and kidneys

Tell your doctor if you are on a salt restricted diet.

Pregnancy and breastfeeding

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

Like most medicines of this kind, Furosemide-Baxter is not recommended to be used during pregnancy. If there is a need to consider Furosemide-Baxter during your pregnancy, your doctor will discuss the risks and benefits of taking it if you are pregnant.

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

Furosemide passes into breast milk and there is a possibility your baby may be affected. Your doctor will discuss the risks and benefits of taking it if you are breastfeeding or planning to breast-feed.

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 should not be taken with Furosemide-Baxter. This includes large amounts of laxatives.

Some medicines may interfere with Furosemide-Baxter.

These medicines may be affected by Furosemide-Baxter, or may affect how well it works. You may need to use different amounts of your medicine, or take different medicines. Your doctor or pharmacist will advise you. These medicines include:

  • certain other fluid tablets or diuretic medicines
  • medicines used to treat high blood pressure and some other heart conditions, especially ACE inhibitors or angiotensin receptor antagonists
  • digoxin and other medicines used to treat heart failure
  • non-steroidal anti-inflammatory drugs (NSAIDs) and aspirin, medicines used to relieve pain, swelling and other symptoms of inflammation, including arthritis
  • methotrexate, a medicine used to treat arthritis and some types of cancer
  • probenecid, a medicine used to treat gout
  • medicines used to relax muscles before or during surgery
  • lithium, a medicine used to treat mood swings and some types of depression
  • medicines used in emergency situations such as adrenaline (epinephrine) and noradrenaline (norepinephrine)
  • cisplatin, a medicine used to treat cancer
  • theophylline, a medicine used to treat asthma
  • certain antibiotics, especially cephalosporins and aminoglycosides
  • amphotericin B (amphotericin), a medicine used to treat fungal infections
  • barbiturates, medicine used to treat epilepsy, to produce calmness, or to help you sleep
  • narcotic/strong pain killers such as codeine and morphine
  • insulin and tablets used to treat diabetes
  • sucralfate, a medicine used to treat stomach ulcers
  • anticonvulsant medicines such as chloral hydrate or phenytoin
  • corticosteroids such as cortisone, prednisone or dexamethasone
  • medicines used to treat thyroid conditions
  • risperidone, an antipsychotic medication used to schizophrenia
  • medicines used during scans to see the images of your body

You should not eat large amounts of liquorice when you are using Furosemide-Baxter.

Your doctor or pharmacist has more information on medicines to be careful with or to avoid while taking Furosemide-Baxter.

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

4. How do I use Furosemide-Baxter?

How to use

Furosemide-Baxter solution for injections are normally administered to you by doctors or nurses in hospital

When to use Furosemide-Baxter

  • Furosemide-Baxter solution for injections are normally given by doctors or nurses in hospital. If you are not sure when to receive it, ask your doctor or pharmacist.

If you use too much Furosemide-Baxter

As Furosemide-Baxter is given to you under the supervision of your doctor, it is unlikely that you will have too much.

However, if you experience any side effects after being given Furosemide-Baxter, you should immediately:

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

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

If you are given too much Furosemide-Baxter, you may feel confused, dehydrated, dizzy or you may pass excessive urine.

5. What should I know while using Furosemide-Baxter?

Things you should do

Tell all the doctors, dentists and pharmacists who are treating you that you are taking Furosemide-Baxter.

If you are about to be started on any new medicine, tell your doctor and pharmacist that you are taking Furosemide-Baxter.

If you plan to have a surgery that needs a general anesthetic, tell your doctor or dentist that you are taking this medicine.

If you become pregnant while you are taking this medicine, tell your doctor or pharmacist immediately.

Tell your doctor if you have excessive vomiting or diarrhea while taking Furosemide-Baxter or if you experience any of the following symptoms:

  • dry mouth or thirst
  • fainting
  • weakness, tiredness or drowsiness
  • muscle pain or cramps
  • fast heart beat
  • passing less urine than normal

If you experience these symptoms, you may be dehydrated because you are losing too much water.

Make sure you drink enough water during any exercise and during hot weather when you are using Furosemide-Baxter, especially if you sweat a lot.

If you do not drink enough water while using Furosemide-Baxter, you may feel faint or light-headed or sick. This is because your blood pressure is dropping suddenly, and you are dehydrating. If you continue to feel unwell, tell your doctor.

If you are about to have any blood tests, tell your doctor that you are taking Furosemide-Baxter. There may be some interference with the results of these tests.

Remind any doctor, dentist, or pharmacist you visit that you are using Furosemide-Baxter.

Things you should not do

Women must not breast feed while being treated with furosemide.

Driving or using machines

Be careful before you drive or use any machines or tools until you know how Fluconazole - Baxter affects you.

Fluconazole - Baxter may cause dizziness or light-headedness in some people. Make sure you know how you react to your medicine before you drive a car, operate machinery, or do anything else that could be dangerous if you are dizzy or lightheaded.

If this occurs, do not drive or operate machines.

Drinking alcohol

Tell your doctor if you drink alcohol.

The effects of alcohol could be made worse while taking Furosemide-Baxter. If you drink alcohol or take strong painkillers, dizziness or lightheadedness may be worse. It is not recommended that you drink alcohol while using Furosemide-Baxter.

Looking after your medicine

  • Furosemide-Baxter will be stored in the hospital pharmacy or in the ward. It will be kept in original packaging below 25°C, protected from light.

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
Bleeding-related:
  • Unusual bleeding or bruising under the skin
Eye, ear, mouth-related:
  • Blurred or impaired vision
  • Ringing or buzzing in the ears
  • Very dry mouth or unusual thirst
Pain-related:
  • Calf muscle spasms
  • Muscle pains or cramps
  • Headache
Body as a whole:
  • Weight loss
  • Weakness or tiredness
  • Numbness or tingling in the hands and/ or feet
  • Fever
  • Restlessness
  • Confusion
  • Drowsiness or a lack of energy
  • Dizziness or light-headedness
  • Vomiting or nausea
  • Diarrhea
Speak to your doctor if you have any of these less serious side effects and they worry you.
These are more common side effects of Furosemide-Baxter. Mostly they are mild or short-lived.

Serious side effects

Serious side effectsWhat to do
Bleeding-related:
  • Bleeding or bruising more easily than normal, nose bleeds
Heart-related:
  • Irregular or fast heart beat
Ear-related:
  • Deafness or ringing in the ears
Skin-related:
  • Flaking or peeling of skin
  • Increased sensitivity to sunlight
Pain-related:
  • Severe stomach pain, often with nausea and vomiting
  • Gout, a disease with painful, swollen joints
Body as a whole:
  • Passing less urine than is normal for you
  • Severe dizziness or a spinning sensation
  • Symptoms of anemia such as tiredness, being short of breath when exercising, dizziness and looking pale
  • Frequent infections such as fever, severe chills, sore throat or mouth ulcers
  • Loss of control of your bladder or bowels (incontinence)
Tell your doctor as soon as possible if you notice any of these side effects.
These may be serious side effects of Furosemide-Baxter.
You may need urgent medical attention.
Serious side effects are uncommon.

Very serious side effects

Very serious side effectsWhat to do
Allergy-related:
  • Sudden signs of allergy such as rash, itching or hives (pinkish, itchy raised areas) on the skin, swelling of the face, lips, tongue, or other parts of the body, shortness of breath, wheezing or trouble breathing
  • Red, often itchy spots similar to the rash seen in measles which starts on the limbs and sometimes on the face and body. The spots may blister and may progress to form raised red, pale-centered marks. Those affected may have fever, sore throat, headache with or without diarrhea.
Pain-related:
  • Chest pain
Body as a whole:
  • Fainting or having a rapid, weak pulse
  • Lockjaw
  • Yellowing of the skin and/ or eyes (jaundice)
Call your doctor straight away, or go straight to the Emergency Department at your nearest hospital if you notice any of these very serious side effects.
These are very serious side effects. You may need urgent medical attention or hospitalization.
These side effects are very rare.

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 Furosemide-Baxter contains

Active ingredient
(main ingredient)
Furosemide
Other ingredients
(inactive ingredients)
sodium chloride, sodium hydroxide, hydrochloric acid, water for injections.
Potential allergensNil

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

What Furosemide-Baxter looks like

Furosemide-Baxter is a clear, colorless, sterile aqueous solution available in a 2 mL (AUST R 148003) and 5 mL (AUST R155969) amber glass ampoule.

Who distributes Furosemide-Baxter

Baxter Healthcare Pty Ltd
1 Baxter Drive
Old Toongabbie
NSW 2146, Australia
Toll Free Number: 1800 229 837
www.baxterhealthcare.com.au

This leaflet was prepared in August 2024.

Published by MIMS October 2024

BRAND INFORMATION

Brand name

Furosemide-Baxter

Active ingredient

Furosemide (frusemide)

Schedule

S4

 

1 Name of Medicine

Furosemide.

2 Qualitative and Quantitative Composition

Furosemide 20 mg/2 mL and 50 mg/5 mL solution for injection.
For the full list of excipients, see Section 6.1 List of Excipients.

3 Pharmaceutical Form

Solution for injection, for Intramuscular (I.M.) or Intravenous (I.V.) use.

4 Clinical Particulars

4.1 Therapeutic Indications

Oedema.

Furosemide-Baxter Injection is indicated in adults, infants and children for the treatment of oedema associated with congestive heart failure, cirrhosis of the liver and renal disease including the nephrotic syndrome.
Furosemide is particularly useful when an agent with greater diuretic potential than that of those commonly employed is desired. Parenteral therapy should be reserved for patients unable to take oral medication or for patients in emergency clinical situations.
Furosemide-Baxter Injection is also indicated as adjunctive therapy in acute pulmonary oedema and cerebral oedema where intense and rapid onset of diuresis is desired. If gastrointestinal absorption is impaired or oral medication is not practical for any reason, furosemide is indicated by the intravenous route. Parenteral use should be replaced with oral furosemide as soon as practical.

4.2 Dose and Method of Administration

Adults.

Parenteral therapy with Furosemide-Baxter injection should be used only in patients unable to take oral medication or in emergency situations and should be replaced with oral therapy as soon as practical.

Oedema.

The usual initial dose of Furosemide-Baxter is 20 to 40 mg given as a single dose, injected intramuscularly or intravenously. The intravenous dose should be given slowly (see Section 4.4 Special Warnings and Precautions for Use). Ordinarily a prompt diuresis ensues. If needed, another dose may be administered in the same manner 2 hours later, or the dose may be increased. The dose may be raised by 20 mg, and given not sooner than 2 hours after the previous dose, until the desired diuretic effect has been obtained. This individually determined single dose should then be given once or twice daily.
Therapy should be individualised according to patient response to gain maximal therapeutic response and to determine the minimal dose needed to maintain that response. Close medical supervision is necessary. If the physician elects to use high dose parenteral therapy, add the Furosemide-Baxter to either Sodium Chloride Injection or Lactated Ringer's Injection, and administer as a controlled intravenous infusion at a rate not greater than 4 mg/min. Furosemide-Baxter Injection is a buffered alkaline solution.

Acute pulmonary oedema.

The usual initial dose of Furosemide-Baxter is 40 mg injected slowly intravenously (see Section 4.4 Special Warnings and Precautions for Use). If a satisfactory response does not occur within 1 hour, the dose may be increased to 80 mg injected slowly intravenously. If necessary, additional therapy (e.g. digitalis, oxygen) may be administered concomitantly.

Cerebral oedema.

The following procedure is recommended, pending further experience.
Intravenous injection of 20 to 40 mg three times daily. A more uniform diuretic action is obtained if the same doses are infused. The rate of infusion must be determined individually in accordance with the diuretic action and the neurological findings.

Infants and children.

Parenteral therapy should be used only in patients unable to take oral medication or in emergency situations, and should be replaced with oral therapy as soon as practical.
The recommended dose of Furosemide-Baxter Injection (intravenously or intramuscularly) in infants and children is 1 mg/kg body weight and should be given slowly under close medical supervision. If the diuretic response to the initial dose is not satisfactory, dosage may be increased by 1 mg/kg not sooner than 2 hours after the previous dose, until the desired effect has been obtained. Doses of greater than 6 mg/kg body weight are not recommended.
Furosemide-Baxter Injection should be inspected visually for particulate matter and discolouration before administration. Do not use if solution is discoloured.
Furosemide-Baxter is for single use in one patient only. Discard any residue.
Although the chemical stability of diluted Furosemide-Baxter Injection has been demonstrated for storage at 25°C for 24 hours, the diluted solution should be used as soon as practicable to reduce risk of microbiological hazard. If storage is necessary hold the diluted solution at 2-8°C for not more than 24 hours.

4.3 Contraindications

Known hypersensitivity to furosemide or sulfonamides or any of the inactive ingredients. Patients allergic to sulfonamides (e.g. sulfonamide antibiotics or sulfonylureas) may show cross-sensitivity to furosemide.
Complete renal shutdown.
If increasing azotaemia and oliguria occur during treatment of severe progressive renal disease, discontinue furosemide.
Severe hypokalaemia, hyponatraemia, hypovolaemia or hypotension must be regarded as contraindications until serum electrolytes, fluid balance and blood pressure have been restored to normal levels.
In hepatic coma or precoma and conditions producing electrolyte depletion, furosemide therapy should not be instituted until the underlying conditions have been corrected or ameliorated.
In breast-feeding women.
Do not administer furosemide to newborns presenting jaundice or to infants with conditions which might induce hyperbilirubinaemia or kernicterus (e.g. Rhesus incompatibility, familial non-haemolytic jaundice etc.) because of furosemide's in vitro potential to displace bilirubin from albumin.
Furosemide-Baxter 250 mg injection must not be used as a bolus injection. It must only be infused using volume or rate controlled infusion pumps to reduce the risk of accidental overdose.

4.4 Special Warnings and Precautions for Use

Excessive diuresis may result in dehydration and reduction in blood volume with circulatory collapse and with the possibility of vascular thrombosis and embolism, particularly in elderly patients.
Excessive loss of potassium in patients receiving cardiac glycosides may precipitate digitalis toxicity.
In patients with hepatic cirrhosis and ascites, initiation of therapy with furosemide is best carried out in hospital.
Sudden alterations of fluid and electrolyte balance in patients with cirrhosis may precipitate hepatic coma, therefore, strict observation is necessary during the period of diuresis.
Cases of reversible or irreversible tinnitus or hearing impairment have been reported. Usually, reports indicate that furosemide ototoxicity is associated with rapid injection or infusion, severe renal impairment, hypoproteinaemia, doses exceeding several times the usual recommended dose, or concomitant therapy with aminoglycoside antibiotics, ethacrynic acid, or other ototoxic drugs. In patients with hypoproteinaemia, e.g. associated with nephrotic syndrome, the effect of furosemide may be weakened and its ototoxicity potentiated. Cautious dose titration is required. If the physician elects to use high dose parenteral therapy, controlled intravenous infusion is advisable (for adults with normal renal function, an infusion rate not exceeding 4 mg furosemide per minute must be used; for adults with impaired renal function [creatinine > 5 mg/dL], an infusion rate of no greater than 2.5 mg per minute must be used).
Caution should be exercised when administering curare or its derivatives to patients undergoing furosemide therapy. It is also advisable to discontinue furosemide for one week prior to any elective surgery.
Rigid sodium restriction is conducive to both hyponatraemia and hypokalaemia, thus strict restriction of sodium intake is not advisable in patients receiving furosemide.
Furosemide should be used with care, especially in the initial stages, in patients with impairment of micturition (e.g. prostatic hypertrophy). Urinary outflow must be secured. In patients with a partial obstruction of urinate outflow (e.g. in patients with bladder emptying disorders, prostatic hyperplasia or narrowing of the urethra), increased production of urine may provoke or aggravate complaints. These patients require careful monitoring.
Careful monitoring is required in patients with gout, with partial obstruction of urinary outflow, in patients at risk from hypotension (e.g. patients with coronary artery stenosis), in patients with latent or manifest diabetes mellitus, in patients with hepatorenal syndrome or in patients with hypoproteinaemia (e.g. associated with nephrotic syndrome). Dose titration, especially in this latter case, is required.
As with any effective diuretic, electrolyte depletion may occur during therapy, especially in patients receiving higher doses and a restricted salt intake. All patients receiving furosemide therapy should be observed for signs of fluid or electrolyte imbalance; namely hyponatraemia, hypochloraemic alkalosis, and hypokalaemia. Periodic determinations of serum electrolytes to detect a possible imbalance should be performed at appropriate intervals, as well as creatinine, blood urea and CO2 content determinations. This is particularly important when the patient is vomiting excessively or receiving parenteral fluids. Warning signs of an imbalance, irrespective of cause include dryness of mouth, thirst, weakness, lethargy, drowsiness, restlessness, muscle pains or cramps, muscular fatigue, hypotension, oliguria, tachycardia, arrhythmia, and gastrointestinal disturbances such as nausea and vomiting. Hypovolaemia or dehydration as well as any significant electrolyte and acid-base disturbances must be corrected. This may require temporary discontinuation of furosemide.
During long-term therapy, a high potassium diet is recommended. Potassium supplements may be required, especially when high doses are used for prolonged periods. Particular caution with potassium is necessary when the patient is on digitalis glycosides, potassium depleting steroids or in the case of infants and children. Potassium supplementation, diminution in dose, or discontinuation of furosemide therapy may be required.
Periodic checks on urine and blood glucose should be made in diabetics and even those suspected of latent diabetes when receiving furosemide. Increases in blood glucose and alterations in glucose tolerance tests with abnormalities of the fasting and 2-hour post prandial sugar have been observed, and rare cases of precipitation of diabetes mellitus have been reported.
Furosemide may lower calcium levels, and rare cases of tetany have been reported.
Accordingly, periodic serum calcium levels should be obtained.
Reversible elevations of blood urea may be seen. These have been observed in association with dehydration, which should be avoided, particularly in patients with renal insufficiency.
Furosemide increases cholesterol and triglycerides short-term. It is not clear whether this effect persists long-term, however, the current evidence does not indicate this.
As with many other drugs, patients should be observed regularly for the possible occurrence of blood dyscrasias, liver damage, or other idiosyncratic reactions.
The possibility exists of exacerbation or activation of systemic lupus erythematosus.
Asymptomatic hyperuricaemia can occur and rarely, gout may be precipitated.
When furosemide is administered parenterally, a maximum injection rate of 4 mg/minute should be used to minimise the risk of ototoxicity.
Intramuscular administration of furosemide must be limited to exceptional cases where neither oral nor intravenous administration are feasible. Intramuscular administration is not suitable for acute conditions such as pulmonary oedema.

Use in the elderly.

No data available.

Paediatric use.

In premature infants, there is the possible development of nephrocalcinosis/nephrolithiasis and therefore renal function must be monitored and renal ultrasonography performed.
In premature infants furosemide administered during the first weeks of life may increase the risk of persistence of Botallo's duct.
Renal calcifications (from barely visible on X-ray to staghorn) have occurred in some severely premature infants treated with intravenous furosemide for oedema due to patent ductus arteriosus and hyaline membrane disease. The concurrent use of chlorothiazides has been reported to decrease hypercalciuria and to dissolve some calculi.
In children, urge to defecate, complaints of abdominal pain and cramping have been reported after IV furosemide. An association of these symptoms with a low serum calcium and/or a low calcium/protein ratio is possible.

Effects on laboratory tests.

No data available.

4.5 Interactions with Other Medicines and Other Forms of Interactions

Combinations that are not recommended.

Furosemide may increase the ototoxic and nephrotoxic potential of certain antibiotics (e.g aminoglycosides and certain cephalosporins (e.g cephaloridine), especially in the presence of impaired renal function, therefore the simultaneous administration of these drugs is not advisable.
Anticonvulsants may decrease the response to furosemide. In isolated cases intravenous administration of furosemide within 24 hours of taking chloral hydrate may lead to flushing, sweating attacks, restlessness, nausea, tachycardia and elevation of blood pressure. As a result, this combination is not recommended.

Precautions for use.

Furosemide should not be used concomitantly with ethacrynic acid or cisplatin because of the possibility of ototoxicity. In addition, nephrotoxicity of cisplatin may be enhanced if furosemide is not given in low doses (e.g. 40 mg in patients with normal renal function) and with positive fluid balance when used to achieve forced diuresis during cisplatin treatment.
Furosemide decreases the excretion of lithium salts and my cause increased serum lithium levels resulting in increased risk of lithium toxicity, including increased risk of cardiotoxic and neurotoxic effects of lithium. It is recommended that lithium levels are carefully monitored in patients receiving this combination.
Administration of furosemide and sucralfate within two hours of each other should be avoided, as sucralfate reduces the absorption of furosemide and hence, reduces its effect.
The action of other antihypertensive drugs may be potentiated by furosemide, especially in combination with ACE inhibitors. The administration of ACE inhibitors to patients pretreated with furosemide may lead to a deterioration in renal function or may result in severe hypotension especially when an angiotensin converting enzyme inhibitor (ACE inhibitor) or angiotensin II receptor antagonist is given for the first time or for the first time in an increased dose. Consideration must be given to interrupting the administration of furosemide temporarily or at least reducing the dose of furosemide for 3 days before starting treatment with an ACE inhibitor or increasing the dose of the ACE inhibitor or angiotensin II receptor antagonist.

To be considered.

The effects of digitalis preparations and drugs inducing QT interval prolongation syndrome may be potentiated by changes in electrolyte concentrations e.g. hypokalaemia, hypomagnesaemia due to furosemide. When a cardiac glycoside is administered concurrently, it should be remembered that potassium or magnesium deficiency increases the sensitivity of the myocardium to digitalis and may increase the toxicity of drugs which induce QT interval prolongation syndrome. When a glucocorticoid is administered during diuretic treatment, the potassium-lowering effect of the steroid should be borne in mind. Carbenoxolone, corticosteroids, prolonged use of laxatives or ingestion of liquorice in large amounts may also predispose a patient to hypokalaemia.
Patients receiving high doses of salicylates, as in rheumatic disease, in conjunction with furosemide may experience salicylate toxicity at lower doses because of competitive renal excretory sites.
Interactions between furosemide and neuromuscular blocking agents have been reported. These appear to be dependent on the dose of furosemide and the neuromuscular blocking agent involved. Low doses of furosemide (0.1-10 microgram/kg) enhance the neuromuscular blockade of tubocurarine and succinylcholine. High doses (1-5 mg/kg) of furosemide have a tendency to antagonise the skeletal muscle relaxing effect of tubocurarine but may potentiate the action of succinylcholine. The clinical relevance of these findings is uncertain.
The combination of furosemide and amphotericin may result in an excessive loss of potassium.
Furosemide may decrease arterial responsiveness to noradrenaline. This diminution is not sufficient to preclude effectiveness of the pressor agent for therapeutic use.
If antihypertensive agents, diuretics or other drugs with blood-pressure lowering potential are given concomitantly with furosemide, a more pronounced fall in blood pressure must be anticipated.
Non-steroidal anti-inflammatory drugs including acetylsalicylic acid may reduce the natriuretic and antihypertensive effects of furosemide in some patients by inhibiting prostaglandin synthesis. In patients with dehydration or pre-existing hypovolaemia, non-steroidal anti-inflammatory drugs may cause renal failure. Salicylate toxicity may be increased by furosemide.
Phenytoin or drugs which undergo significant renal tubular secretion such as methotrexate and probenecid, may attenuate the effects of furosemide. Conversely furosemide may decrease renal elimination of these drugs. In the case of high dose treatment (in particular of both furosemide and the other drugs), this may lead to an increased risk of adverse effects due to furosemide or the concomitant medication.
IV furosemide was shown to increase the steady state concentration of theophylline by 20% in a small number of asthmatic patients; hence it is appropriate to measure serum theophylline levels when both drugs are given together.
The effects of curare-type muscle relaxants or of theophylline may be increased.
It should be borne in mind that the effect of antidiabetics or of pressor amines (e.g. adrenaline, noradrenaline) may be attenuated by furosemide.
Impairment of renal function may develop in patients receiving concurrent treatment with furosemide and high doses of certain cephalosporins. The harmful effects of nephrotoxic drugs on the kidney may be increased.
Concomitant use of cyclosporine A and furosemide is associated with increased risk of gouty arthritis secondary to furosemide-induced hyperuricemia and cyclosporine impairment of renal urate excretion.
Patients who were at high risk for radiocontrast nephropathy treated with furosemide experienced a higher incidence of deterioration in renal function after receiving radiocontrast compared to high-risk patient who received only intravenous hydration prior to receiving radiocontrast.

4.6 Fertility, Pregnancy and Lactation

Effects on fertility.

No data available.
(Category C)
Furosemide must not be given during pregnancy unless there are compelling medical reasons. Treatment during pregnancy requires monitoring of foetal growth.
Thiazides, related diuretics and loop diuretics enter the foetal circulation and may cause electrolyte disturbances. Neonatal thrombocytopaenia has been reported with thiazides and related diuretics. Loop diuretics, like furosemide and bumetanide, are probably also associated with this risk. During the latter part of pregnancy, products of this type should only be given on sound indications, and then in the lowest effective dose. In pregnancy, furosemide must only be used in patients with a marked reduction in glomerular filtration.
Furosemide passes into the breast milk and inhibits lactation. Women must not breast feed if being treated with furosemide.

4.7 Effects on Ability to Drive and Use Machines

Some adverse effects (e.g. an undesirable pronounced fall in blood pressure) may impair the patient's ability to concentrate and react and therefore constitute a risk in situations where these abilities are of special importance (e.g. operating a vehicle or machinery).

4.8 Adverse Effects (Undesirable Effects)

As with other diuretics, electrolytes and water balance may be disturbed during therapy with furosemide, especially in patients receiving high doses for a prolonged period.
Excessive diuresis may give rise, especially in elderly patients and children, to circulatory disturbances such as headache, dizziness, dry mouth or visual impairment, as symptoms of hypovolaemia. In extreme cases, hypovolaemia and dehydration may lead to hypotension, circulatory collapse and, in elderly patients in particular, thrombophilia. However, with individualised dosage, acute haemodynamic reactions are generally not to be expected, although diuresis sets in rapidly.
All saluretics may cause hypokalaemia, mainly in cases of low potassium diet, vomiting or chronic diarrhoea.
Factors such as underlying diseases (liver cirrhosis, cardiac failure), concomitant medication or nutritional inadequacies (excessive restriction of salt intake), may lead to sodium or other electrolyte or fluid deficiencies which may produce a fall in orthostatic blood pressure, calf muscle spasms, anorexia, weakness, dizziness, drowsiness, apathy, vomiting and confusion.
Furosemide may lower the serum calcium level which may trigger a state of increased neuromuscular irritability. In very rare cases, tetany has been observed. In premature infants, calcium salts may be deposited in the renal tissue (nephrocalcinosis).
Hypomagnesaemia and, in rare cases, tetany or cardiac arrhythmias have been observed as a consequence of increased renal magnesium loss.
Treatment with furosemide may lead to transitory increases in blood creatinine and urea levels. Serum levels of uric acid may increase and attacks of gout may occur.
Pre-existing metabolic alkalosis (e.g. due to decompensated liver cirrhosis) may be aggravated during furosemide treatment.

Hepatic system.

In isolated cases, acute pancreatitis and increases in liver transaminases have been observed. Additionally, intrahepatic cholestasis and jaundice have been reported. Furosemide may increase the bile flow and distend the biliary tree which is already obstructed.

Central nervous system.

Reactions such as dizziness, vertigo, paraesthesia, headache and blurred vision occasionally accompany furosemide induced diuresis. Reversible hearing impairment and tinnitus and rarely, permanent tinnitus and impairment of hearing have been observed, especially in patients with markedly reduced renal function or hypoproteinaemia (e.g. in nephrotic syndrome). This occurs particularly when the recommended rate of injection or infusion of 4 mg per minute (normal renal function) or 2.5 mg per minute (impaired renal function) is exceeded, or in patients who are also receiving drugs known to be ototoxic.

Dermatologic.

Allergic reactions may occur in the form of dermatitis, including rash, urticaria and rare cases of exfoliative dermatitis, necrotising angiitis, bullous eruptions, erythema multiforme and purpura and pruritus. Photosensitivity reactions have been reported.

Haematologic.

The following rare adverse reactions have been reported: eosinophilia, thrombophlebitis, haemolytic or aplastic anaemia, leukopaenia, thrombocytopaenia and agranulocytosis. Vasculitis may also occur.

Urinary system.

Excessive diuresis and dehydration could cause transient elevation of creatinine and BUN and reduction of GFR. In elderly men with prostatic hypertrophy, acute urinary retention with overflow incontinence may occur. Symptoms of existing conditions of obstructed micturition, such as ureterostenosis or hydronephrosis, may be triggered or aggravated by pronounced diuresis. Interstitial nephritis has also been reported with furosemide use.

Cardiovascular.

Orthostatic hypotension may occur and may be aggravated by alcohol, narcotics and barbiturates. Ischaemic complications have also been reported in elderly patients.

Other.

Restlessness, hyperuricaemia, fever, a rise in serum cholesterol and triglyceride, in patients with hepatocellular insufficiency, hepatic encephalopathy may occur.
Treatment with furosemide has occasionally caused reduced glucose tolerance and deterioration in cases of manifest diabetes, or made latent diabetes manifest.
Rarely, fever or paraesthesiae and occasionally photosensitivity may occur.
In premature infants, furosemide may precipitate nephrocalcinosis/nephrolithiasis. If furosemide is administered to premature infants during the first weeks of life, it may increase the risk of persistence of patent ductus arteriosus.
Following intramuscular injection, local reactions such as pain may occur.
Due to the possibility of side effects such as hypotension, patients' ability to drive or operate machinery may be impaired, especially at the commencement of therapy. Anaphylactic shock is rare, but is acutely life-threatening if it does occur.
Whenever adverse reactions are moderate or severe, furosemide dose should be reduced or therapy withdrawn.

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

The clinical picture in acute or chronic overdose depends primarily on the extent and consequences of electrolyte and fluid loss; e.g. dehydration, blood volume reduction, hypotension, electrolyte imbalance, cardiac arrhythmias (including A-V block and ventricular fibrillation), hypokalaemia and hypochloraemic alkalosis, and extensions of its diuretic action. Symptoms of these disturbances include severe hypotension (progressing to shock), acute renal failure, thrombosis, delirious states, flaccid paralysis, apathy and confusion.
The acute toxicity of furosemide has been determined in mice, rats and dogs. In all three, the oral LD50 exceeded 1,000 mg/kg body weight, while the intravenous LD50 ranged from 300 to 680 mg/kg. The acute intragastric toxicity in neonatal rats is 7 to 10 times that of adult rats. The concentration of furosemide in biological fluids associated with toxicity or death is not known.
No specific antidote to furosemide is known. If ingestion has only just taken place, attempts may be made to limit further systemic absorption of the active ingredient by measures such as activated charcoal.
Treatment of overdosage is supportive and consists of replacement of excessive fluid and electrolyte losses. Serum electrolytes, carbon dioxide level and blood pressure should be determined frequently. Adequate drainage must be assured in patients with urinary bladder outlet obstruction (such as prostatic hypertrophy). Haemodialysis does not accelerate furosemide elimination.
For information on the management of overdose, contact the Poisons Information Centre on 13 11 26 (Australia).

5 Pharmacological Properties

5.1 Pharmacodynamic Properties

Mechanism of action.

Furosemide is a potent diuretic with a rapid action. It inhibits sodium and chloride absorption in the ascending limb of Henle's loop and in both the proximal and distal tubules. The high degree of efficacy is due to this unique site of action. The action on the distal tubule is independent of any inhibitory effect on carbonic anhydrase or aldosterone.
Furosemide may promote diuresis in cases which have previously proved resistant to other diuretics.
Furosemide has no significant pharmacological effects other than on renal function.

Clinical trials.

No data available.

5.2 Pharmacokinetic Properties

Absorption.

Furosemide is rapidly absorbed from the gastrointestinal tract. Absorption rates in healthy subjects have been reported from 60 - 69% and from 43 - 46% in patients with end stage renal failure.
The onset of diuresis following intravenous administration is within 5 minutes and somewhat later after intramuscular administration. The peak effect occurs within the first half hour. The duration of diuretic effect is approximately 2 hours.

Distribution.

Furosemide is extensively bound to plasma proteins, mainly to albumin. Plasma concentrations ranging from 1 - 400 microgram/mL are 91 - 99% bound in healthy individuals. The unbound fraction averages 2.3 - 4.1% at therapeutic concentrations.

Metabolism.

Recent evidence suggests that furosemide glucuronide is the only, or at least the major, bio-transformation product of furosemide in man.

Excretion.

In patients with normal renal function, approximately 80% of an intravenous or intramuscular dose is excreted in the urine within 24 hours. Urinary excretion is accomplished both by glomerular filtration and proximal tubular secretion, which accounts for roughly 66% of the ingested dose, the remainder being excreted in the faeces. A small fraction is metabolised by cleavage of the side chain.
Significantly more furosemide is excreted in urine following the IV injection than after oral administration.
Furosemide has a biphasic half life in the plasma with T1/2 ranging up to 100 minutes; T1/2 is prolonged by renal and hepatic insufficiency and in new born infants.

5.3 Preclinical Safety Data

Genotoxicity.

No data available.

Carcinogenicity.

No data available.

6 Pharmaceutical Particulars

6.1 List of Excipients

Inactive ingredients: sodium chloride, sodium hydroxide, hydrochloric acid, water for injections.

6.2 Incompatibilities

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. Protect from light. Occasionally crystal deposits may be seen when Furosemide-Baxter ampoules are stored at low temperatures. Dissolve crystals by warming to 40°C and injection may be used.
Although the chemical stability of diluted Furosemide-Baxter has been demonstrated for storage at 25°C for 24 hours, the diluted solution should be used as soon as practicable to reduce the risk of microbiological hazard. If storage is necessary, hold the diluted solution at 2-8°C (under refrigeration) for not more than 24 hours.

6.5 Nature and Contents of Container

Furosemide-Baxter ampoules, 20 mg/2 mL (AUST R 148003); 50 mg/5 mL (AUST R 155969): packs of 5 and 25 ampoules.

6.6 Special Precautions for Disposal

In Australia, any unused medicine or waste material should be disposed of by taking to your local pharmacy.

6.7 Physicochemical Properties

Furosemide is a white to off-white odourless crystalline powder. It is practically insoluble in water, sparingly soluble in alcohol, freely soluble in dilute alkali solutions and insoluble in dilute acids. Solutions for injection are prepared with sodium hydroxide giving solutions with a pH of 8.0 to 9.3. Furosemide should be protected from light.

Chemical structure.


Furosemide has the chemical name 4-chloro-N-furfuryl-5-sulfamoylanthranilic acid.
It has the chemical formula C12H11ClN2O5S with a molecular weight of 330.7.

CAS number.

53-31.9.

7 Medicine Schedule (Poisons Standard)

S4 - Prescription Only Medicine.

Summary Table of Changes