Consumer medicine information

Intal CFC-Free Inhaler

Sodium cromoglycate

BRAND INFORMATION

Brand name

Intal CFC-Free Inhaler and Intal Forte CFC-Free Inhaler

Active ingredient

Sodium cromoglycate

Schedule

S4

 

Consumer medicine information (CMI) leaflet

Please read this leaflet carefully before you start using Intal CFC-Free Inhaler.

SUMMARY CMI

Intal® CFC-Free Inhaler

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 Intal CFC-Free Inhaler?

Intal CFC-Free Inhaler contains the active ingredient sodium cromoglycate. Intal CFC-Free Inhaler is used to treat asthma and can be used before exercise.

For more information, see Section 1. Why am I using Intal CFC-Free Inhaler? in the full CMI.

2. What should I know before I use Intal CFC-Free Inhaler?

Do not use if you have ever had an allergic reaction to Intal CFC-Free Inhaler 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 or plan to breastfeed.

For more information, see Section 2. What should I know before I use Intal CFC-Free Inhaler? in the full CMI.

3. What if I am taking or using 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.

More information can be found in Section 3. What if I am taking other medicines? in the full CMI.

4. How do I use Intal CFC-Free Inhaler?

The usual starting dose is two puffs four times each day.

More instructions can be found in Section 4. How do I use Intal CFC-Free Inhaler? in the full CMI. Instructions on how to use and clean the inhaler can be found in Section 4. How do I use Intal CFC-Free Inhaler? in the full CMI.

5. What should I know while using Intal CFC-Free Inhaler?

Things you should do
  • Remind any doctor, dentist or pharmacist you visit that you are using Intal CFC-Free Inhaler.
  • If you have an Asthma Action Plan that you have agreed with your doctor, always follow it closely.
  • Tell your doctor straight away if your asthma symptoms get worse.
  • Tell your doctor if you become pregnant or plan to become pregnant.
  • Tell your doctor if you are breastfeeding or plan to breastfeed.
Things you should not do
  • Do not stop using this medicine suddenly or lower the dosage unless your doctor tells you to.
  • Do not use Intal CFC-Free Inhaler to relieve acute attacks of asthma.
  • Do not take any other medicines for your breathing problems without checking with your doctor.
Driving or using machinesBe careful before you drive or use any machines or tools until you know how Intal CFC-Free Inhaler affects you.
Looking after your medicine
  • Store below 30°C. Do not refrigerate or freeze.
  • Store in a cool dry place away from moisture, heat or sunlight.

For more information, see Section 5. What should I know while using Intal CFC-Free Inhaler? in the full CMI.

6. Are there any side effects?

Less serious side effects include sore throat, cough, difficulty breathing and wheezing. Serious side effects include an allergic reaction. Symptoms include dizziness, light-headed, wheezing, difficulty breathing or shallow breathing, swelling of the face, lips, tongue or other parts of the body, rash, itching or hives.

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

Intal® CFC-Free Inhaler

Active ingredient: sodium cromoglycate


Consumer Medicine Information (CMI)

This leaflet provides important information about using Intal CFC-Free Inhaler. 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 Intal CFC-Free Inhaler.

Where to find information in this leaflet:

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

1. Why am I using Intal CFC-Free Inhaler?

Intal CFC-Free Inhaler contains the active ingredient sodium cromoglycate. Intal CFC-Free Inhaler is an anti-allergic medicine. These medicines help to lower your allergic response to substances or triggers, such as house dust mites or smoke, which could lead to asthma symptoms.

Intal CFC-Free Inhaler is inhaled into the lungs for the treatment of asthma.

Intal CFC-Free Inhaler is used to prevent bronchial asthma due to allergy, exercise, cold air or irritants, in both adults and children.

Intal CFC-Free Inhaler can be used before exercise. This should prevent asthma symptoms, such as wheeze, cough, and breathlessness.

Intal CFC-Free Inhaler will not relieve the symptoms of an asthma attack that has already started.

You should follow your doctor's advice and prescribed treatment to get relief from a sudden asthma attack.

With regular use, Intal CFC-Free Inhaler will help prevent asthma symptoms from occurring.

2. What should I know before I use Intal CFC-Free Inhaler?

Warnings

Do not use Intal CFC-Free Inhaler if:

  • you are allergic to sodium cromoglycate, or any of the ingredients listed at the end of this leaflet.
  • Always check the ingredients to make sure you can use this medicine.

Check with your doctor if you:

  • have any other medical conditions
  • use or take any medicines for any other condition
  • have allergies to any medicines, or other substances, foods, preservatives, or dyes

Ask your doctor to write an asthma management plan for you before you begin to use Intal CFC-Free Inhaler. You should discuss this plan regularly with your doctor to check your treatment.

If you need treatment for a sudden asthma attack, use the "reliever" medicine your doctor has prescribed for you.

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.

Intal CFC-Free Inhaler is not known to be harmful in pregnancy, however, it does pass into breast milk.

3. What if I am taking or using 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.

Intal CFC-Free Inhaler can be used with most other medicines which are used to prevent or treat asthma.

Tell your doctor if you are using or taking a steroid medicine, such as:

  • Budesonide
  • Fluticasone
  • Beclometasone
  • Prednisolone

Your doctor may wish to lower the amount of steroid you are taking.

Check with your doctor or pharmacist if you are not sure about what medicines, vitamins or supplements you are taking and if these affect Intal CFC-Free Inhaler.

4. How do I use Intal CFC-Free Inhaler?

If you are not sure how to use an inhaler, ask your doctor or pharmacist.

If your child has difficulty using the inhaler properly, ask your doctor or pharmacist for advice on the use of a spacer device. Young children may benefit from the use of a spacer with their inhaler.

Children should only use their inhaler on medical advice and with the help of an adult.

How much to use

Follow the instructions provided and use Intal CFC-Free Inhaler until your doctor tells you to stop.

The usual starting dose is two puffs four times each day. Your doctor may have prescribed a higher dose.

When to use Intal CFC-Free Inhaler

Your doctor or pharmacist will discuss your individual dosing schedule with you.

  • A suggested dosing schedule is:
    - two puffs when you wake in the morning,
    - two puffs every 4 to 6 hours during the day, and
    - two puffs at bedtime.
  • Intal CFC-Free Inhaler should be used 15 to 30 minutes before exercise. This should prevent symptoms such as wheezing, cough or breathlessness.

Intal CFC-Free Inhaler should be used every day even if you have no signs of asthma.

How to use Intal CFC-Free Inhaler

If your inhaler is new, you will need to prime the inhaler by pressing the canister down 4 times before you use it. If you use your inhaler again within 2 days, there is no need to prime it again.

If your inhaler has not been used for 3 to 7 days, you will need to prime it with 2 sprays.

If your inhaler has not been used for more than 7 days, you will need to prime it with 4 sprays.

Follow the instructions below:

  1. Remove the cover from the mouthpiece, and shake the inhaler vigorously.

  1. Holding the inhaler well away from your mouth, breathe out gently (but not fully). To avoid condensation and blockage of the spray, DO NOT breathe out through the mouthpiece.

  1. Place the mouthpiece in your mouth and close your lips around it. After starting to breathe in slowly and deeply through your mouth, press the metal canister firmly to release the powder, and continue to breathe in.

  1. Remove the inhaler from your mouth and hold your breath for 10 seconds, or as long as is comfortable, before breathing out slowly.

  1. If you are to take a second inhalation, you should wait at least one minute before repeating steps 2, 3 and 4. After use replace the cover on the mouthpiece.

Note - if you are using a spacer with the inhaler, be careful to follow the instructions provided with the spacer.

After using Intal CFC-Free Inhaler

Cleaning instructions

This pack contains an extra mouthpiece that can be used while the other mouthpiece is being dried after washing.

Intal CFC-Free Inhaler does not contain chlorofluorocarbons (CFC), which harms the environment and contributes to the depletion of the ozone layer. A new propellant is used which is more environmentally friendly and is in keeping with our responsibility to support the phasing out of all CFC-containing products in Australia. Unfortunately, this new propellant tends to result in more blockage in the mouthpiece, which can only be prevented by daily cleaning and drying of the mouthpiece.

Therefore, it is very important to keep Intal CFC-Free Inhaler clean and dry to prevent build-up of excess powder in the mouthpiece.

Your mouthpiece must be regularly cleaned and dried.

For best results wash the mouthpiece every night to prevent the build-up of excess powder which can cause blockage.

Follow the instructions below:

  1. Remove the blue cap and the metal canister with the white rubber cap from the mouthpiece before washing.
  2. Wash the white plastic mouthpiece in hand-hot water through the top for a minute.
  3. Wash through the bottom for a minute.
  4. Shake out the excess water from inside by tapping the mouthpiece on a hard surface.
  5. Leave overnight to dry thoroughly.
  6. Before replacing the canister into the mouthpiece make sure that the white rubber cap firmly sits onto the metal canister.
  7. When the mouthpiece is completely dry replace the metal canister.

IMPORTANT:

Never try to unblock the mouthpiece with a pin as this will damage the inhaler. Never wash the metal canister.

Do not remove the white rubber cover from the metal canister.

If the inhaler is blocked you may wish to take the added step of soaking the mouthpiece in hot water for 20 minutes after removing the canister and blue cap, then following steps 2 to 7 above.

For further instructions please call 1800 818 806.

If you forget to use Intal CFC-Free Inhaler

Intal CFC-Free Inhaler should be used regularly at the same time each day.

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

If you use too much Intal CFC-Free Inhaler

If you think that you have used too much Intal CFC-Free Inhaler, 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 Intal CFC-Free Inhaler?

Things you should do

If you have an Asthma Action Plan that you have agreed with your doctor, always follow it closely.

Continue using Intal CFC-Free Inhaler for as long as your doctor tells you to.

Visit your doctor regularly to check on your asthma condition.

If you are about to be started on any new medicine, tell your doctor or pharmacist that you are using Intal CFC-Free Inhaler.

If you are taking or using a steroid your doctor may decide to lower the amount taken. Follow your doctor's instructions carefully. Tell your doctor straight away if your asthma symptoms get worse.

Remind any doctor, dentist or pharmacist you visit that you are using Intal CFC-Free Inhaler.

Call your doctor straight away if you:

  • become pregnant or intend to become pregnant.
  • are breastfeeding or plan to breastfeed.

Things you should not do

  • Do not stop using this medicine or lower the dosage unless your doctor tells you to.
  • Do not take any other medicines for your breathing problems without checking with your doctor.
  • Do not use Intal CFC-Free Inhaler to relieve acute attacks of asthma. If you become wheezy or tight in the chest before your next dose of Intal CFC-Free Inhaler is due, use a 'reliever puffer' in the usual way.
  • Do not give Intal CFC-Free Inhaler to anyone else, even if they have the same condition as you.
  • Do not use Intal CFC-Free Inhaler to treat any other complaints unless your doctor tells you to.

Driving or using machines

Be careful before you drive or use any machines or tools until you know how Intal CFC-Free Inhaler affects you.

Looking after your medicine

  • Store below 30°C. Do not refrigerate or freeze.

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

Store it in a cool dry place away from moisture, heat or sunlight; for example:

  • Do not store it in the bathroom or near a sink,
  • Do not store it in the car or on window sills.

Do not puncture the container or throw it into a fire.

Keep it where young children cannot reach it.

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.

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
  • sore throat
  • cough
  • difficulty breathing
  • swelling with fluid in tissues
  • headache
  • stomach pain
  • diarrhoea
  • painful joints
  • sore muscles
  • skin rashes
  • wheezing
  • difficulty breathing
Speak to your doctor if you have any of these less serious side effects and they worry you.
These effects are usually mild.

Serious side effects

Serious side effectsWhat to do

Worsening of asthma symptoms

  • Allergic reaction related

Symptoms include

  • dizziness
  • light-headed
  • swelling of lips, face, throat, or tongue
  • difficulty swallowing
  • difficulty breathing
  • wheezing
  • tightness in the chest
  • hives, skin rash or itching
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 Intal CFC-Free Inhaler contains

Active ingredient
(main ingredient)
Each puff contains 1 mg of sodium cromoglycate
Other ingredients
(inactive ingredients)
  • Povidone
  • Macrogol 600
  • Apaflurane

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

Intal CFC-Free Inhaler does not contain any chlorofluorocarbons (CFCs).

What Intal CFC-Free Inhaler looks like

Intal CFC-Free Inhaler is supplied in a canister containing 200 puffs (Aust R 93909).

Each pack contains an additional mouthpiece to assist in the cleaning and maintenance of Intal CFC-Free Inhaler.

Who distributes Intal CFC-Free Inhaler

Intal CFC-Free Inhaler is distributed in Australia by:

sanofi aventis Australia pty ltd
12-24 Talavera Road
Macquarie Park, NSW 2113
Freecall No: 1800 818 806

Intal CFC-Free Inhaler is made in the UK.

This leaflet was prepared in July 2020.
intal-ccdsv4-cmiv1-14jul20

Published by MIMS January 2021

BRAND INFORMATION

Brand name

Intal CFC-Free Inhaler and Intal Forte CFC-Free Inhaler

Active ingredient

Sodium cromoglycate

Schedule

S4

 

1 Name of Medicine

Sodium cromoglycate.

2 Qualitative and Quantitative Composition

Intal (1 mg) CFC-Free.

Each actuation contains sodium cromoglycate 1.0 mg.

Intal Forte (5 mg) CFC-Free.

Each actuation contains sodium cromoglycate 5.0 mg.
For the full list of excipients, see Section 6.1 List of Excipients.

3 Pharmaceutical Form

Pressurised oral inhalation.
Intal is a metered dose inhaler containing sodium cromoglycate as a suspension in the propellant, apaflurane, a non CFC (chlorofluorocarbon) propellant.

4 Clinical Particulars

4.1 Therapeutic Indications

The prophylactic treatment of bronchial asthma, including the prevention of exercise induced bronchospasm.

4.2 Dose and Method of Administration

Patients vary in their response to Intal CFC-Free formulations.

Intal (1 mg) CFC-Free.

Adults and children.

Two inhalations of the aerosol four times daily. The suggested dosage regimen is two inhalations on retiring at night and on waking in the morning and at intervals of 4 to 6 hours. Additional doses before exercise may be taken.

Intal Forte (5 mg) CFC-Free.

The recommended initial dosage of Intal Forte (5 mg) CFC-Free is two inhalations twice daily. In some patients with more severe asthma, or during periods of severe challenge, an increased dosage of up to four inhalations four times daily may be required to achieve optimal control. To prevent asthmatic symptoms associated with exercise, a dose of two to four inhalations 5-10 minutes prior to exercise is recommended.

Maintenance treatment.

Maintenance dosage should be individually assessed. Patients should be warned against suddenly discontinuing therapy when symptoms have been partially or completely controlled by Intal CFC-Free formulations.
Since the therapy is essentially prophylactic it is important to continue therapy in those patients who benefit. If it is necessary to withdraw this treatment it should be done progressively over one week.
Symptoms of asthma may recur. (see Section 4.4 Special Warnings and Precautions for Use).

Method of administration.

Intal (1 mg) CFC-Free.

Prime the inhaler with four actuations prior to first use. If the inhaler is not used for more than 2 days, re-priming of the inhaler with four actuations is advised.

Intal Forte (5 mg) CFC-Free.

Prime the inhaler with four actuations prior to first use. Re-priming of the inhaler is not required where periods of nonuse are between zero and two days (i.e. less than 48 hours). Two re-priming actuations are required after periods of nonuse of between three and seven days (i.e. more than 48 hours). Beyond seven days of nonuse, re-priming of the inhaler is accomplished with four actuations, as per the original priming instructions.*
The importance of regular washing of the Intal CFC-Free mouthpiece should be impressed upon the patient. The propellant used in Intal CFC-Free formulations is more prone to cause blockage, which may be prevented by washing the mouthpiece every night according to the enclosed leaflet instructions, and alternating daily with the spare mouthpiece provided.
Most patients will benefit from the consistent use of a spacer device with their metered dose inhaler (MDI or puffer), particularly those with poor inhaler technique. Use of a spacer will also decrease the amount of drug deposited in the mouth and back of the throat and, therefore, reduce the incidence of local side effects such as mouth and throat irritation and hoarse voice.
In those people using a spacer, a change in formulation of the drug used, or a change in the make of spacer may be associated with alterations in the amount of drug delivered to the lungs. The clinical significance of these alterations is uncertain. However, in these situations, the person should be monitored for any loss of asthma control.
The patient should be instructed to closely follow the instructions for the proper use of the spacer.
Static on the walls of the spacer may cause variability in drug delivery. Patients should be instructed to wash the spacer in warm water and detergent and allow it to dry without rinsing or drying with a cloth. This should be performed before initial use of the spacer and at least monthly thereafter.
* REP/06577v1 "Determination of priming, Re-priming and Loss of Prime Characteristics for Intal 1 mg HFA-227 Metered Dose Inhalers" 31 July 2002.

4.3 Contraindications

Hypersensitivity to sodium cromoglycate or any excipients of the formulation.

4.4 Special Warnings and Precautions for Use

Intal formulations are not intended for the relief of an acute attack of bronchospasm.
Severe anaphylactic reactions can occur extremely rarely after sodium cromoglycate administration.
Patients may experience cough and/or bronchospasm following administration of Intal formulations. Some patients who develop bronchospasm may not be able to continue administration despite prior bronchodilator administration. Rarely, severe bronchospasm has been encountered.
In those cases where reduction of steroid treatment is attempted in patients receiving sodium cromoglycate, the patient must be carefully supervised while the steroid dose is reduced in a stepwise fashion. If possible, peak flow monitoring should be continued during such reductions and patients should be given instructions about what action to take if deterioration of asthma symptoms occurs.
Treatment with Intal formulations should be discontinued if an eosinophilic pneumonia appears.
If an Intal formulation is to be withdrawn, the dosage should normally be reduced gradually over a period of a week, to avoid exacerbation of asthma. Symptoms of asthma may recur, following withdrawal of treatment.
For maintenance treatment of asthma, Intal formulations are essentially prophylactic and must be taken regularly to achieve benefit (see Section 4.2 Dose and Method of Administration).

Use in hepatic impairment.

No data available.

Use in renal impairment.

No data available.

Use in the elderly.

No data available.

Paediatric use.

See Section 4.2 Dose and Method of Administration.

Effects on laboratory tests.

No data available.

4.5 Interactions with Other Medicines and Other Forms of Interactions

No specific drug-drug interaction studies have been undertaken with Intal CFC-Free formulations. However, no evidence of interaction with other drugs has been observed with the CFC formulation.

4.6 Fertility, Pregnancy and Lactation

Effects on fertility.

There was no evidence of impaired fertility in laboratory studies conducted subcutaneously in rats at doses of 175 mg/kg/day in males and 100 mg/kg/day in females.
(Category B1)
Intal may be assumed to have been taken by a large number of pregnant women and women of childbearing age without any signs of disturbance of the reproductive process, in the form of an increased frequency of malformations or other direct or indirect harmful effects on the foetus, having been observed to date. As with all medication, caution should be exercised, especially during the first trimester of pregnancy. However use in pregnancy should only occur if the benefit to the mother outweighs the potential risk to the foetus.
Sodium cromoglycate passes into human breast milk, and its safety in infants has not been established. The drug, therefore, is not recommended for nursing mothers unless the expected benefit outweighs any potential risk.

4.7 Effects on Ability to Drive and Use Machines

The effects of this medicine on a person's ability to drive and use machines were not assessed as part of its registration.

4.8 Adverse Effects (Undesirable Effects)

Mild throat irritation, coughing and transient bronchospasm may occur. As with other inhalation therapy, paradoxical bronchospasm may occur immediately after administration. The product should be discontinued and alternative treatment instituted. Hypersensitivity reactions, including angioedema, bronchospasm, hypotension and collapse, have been reported extremely rarely.
Adverse experiences reported among patients treated with Intal Forte or Intal Forte CFC-free during comparative clinical trials are shown in Table 1. Included are all adverse experiences occurring with an incidence of 1% or greater in any treatment group, and judged to be treatment related.
The following events have been reported very rarely, but a causal association with sodium cromoglycate has not been established: headache; abdominal pain and diarrhoea; arthralgia and myalgia; urticaria and skin rashes.
Very rare cases of eosinophilic pneumonia have been reported.

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 (Australia) or https://nzphvc.otago.ac.nz/reporting/ (New Zealand).

4.9 Overdose

There have been no reported cases in humans of overdosage of the drug. Symptomatic treatment is recommended should overdosage occur.
For information on the management of overdose, contact the Poisons Information Centre on 131126 (Australia) or the National Poisons Centre on 0800 POISON or 0800 764 766 (New Zealand).

5 Pharmacological Properties

5.1 Pharmacodynamic Properties

Pharmacotherapeutic group: other drugs for obstructive airway diseases, inhalants; antiallergic agents, excluding corticosteroids, ATC code: R03BC01.

Mechanism of action.

Sodium cromoglycate inhibits the release from sensitised cells of mediators of the allergic reaction. In the lung this inhibition of mediator release prevents both the immediate and late asthmatic response to immunological and other stimuli. It has no effect on normal immunological defence mechanisms and no intrinsic bronchodilator or antihistamine activity.

Clinical trials.

An exercise challenge study was performed in 16 mild to moderate paediatric and adult asthmatics who had a history of exercise induced bronchospasm. The protective effect of Intal Forte CFC-Free was compared with that of Intal Forte CFC formulation and placebo. For both the overall population and the children subgroup, there was a statistically significant difference between the percent decrease in FEV1 for Intal Forte CFC-Free and Intal Forte CFC when compared with placebo (p < 0.05) and no statistically significant difference between Intal Forte CFC-Free and Intal Forte CFC formulation. Therefore it can be concluded that a clinically significant protection against exercise induced asthma, comparable to that seen with Intal Forte CFC formulation, can be achieved with Intal Forte CFC-Free in adult as well as in paediatric populations.
A comparative study was conducted to assess the safety of Intal Forte CFC-Free in a population of 184 asthmatic children over a period of 4 weeks and to determine if there were any adverse effects following changeover from Intal Forte CFC formulation to Intal Forte CFC-Free. Pulmonary function tests and other parameters used to monitor asthma control improved during the baseline period and remained stable when the patients were switched to Intal Forte CFC-Free. This finding supports the use of Intal Forte CFC-Free as a safe and effective alternative to Intal Forte CFC formulation.

5.2 Pharmacokinetic Properties

When the compound is administered by inhalation up to 10% of the dose is absorbed in the lung. The remainder is either exhaled, deposited in the oropharynx, or is swallowed and eliminated via the alimentary tract. Approximately 1% of the inhaled dose is absorbed in the gastrointestinal tract. The absorption rate in the lungs is slower than the elimination rate (elimination half life 1.5-2 hours). A single dose of 2 x 5 mg in healthy subjects was associated with a mean maximum plasma concentration of 6.2 nanogram/mL (sd 4.1). Sodium cromoglycate is moderately and reversibly bound to plasma proteins (approximately 65%) and is not metabolised in humans. It is excreted unchanged in both urine and bile in approximately equal proportions.

5.3 Preclinical Safety Data

Genotoxicity.

Sodium cromoglycate was not genotoxic in assays for gene mutations and chromosomal damage.

Carcinogenicity.

Long term studies of sodium cromoglycate in mice (12 months intraperitoneal administration at doses up to 150 mg/kg three days per week), hamsters (intraperitoneal administration at doses up to 52.6 mg/kg three days per week for 15 weeks followed by 17.5 mg/kg three days per week for 37 weeks), and rats (18 months subcutaneous administration at doses up to 75 mg/kg six days per week) showed no neoplastic effects.

Propellant.

Intal CFC-Free formulations contain a hydrofluoroalkane (HFA-227/apaflurane) propellant. In animal studies, HFA-227 has been shown to have no significant pharmacological effects, except at high exposure concentrations when narcosis and a relatively weak sensitisation to the arrhythmogenic effects of catecholamines were found. The potency of the cardiac sensitisation was less than that of trichloromethane (CFC-11). Although large doses of CFC propellants have been reported in animals to produce cardiac arrhythmias and sensitise their hearts to adrenaline induced arrhythmia, data in humans are limited. Following inhalation of the maximum recommended dose of Intal in humans, the plasma concentrations of the propellant were quite low. Excessive use of Intal should, however, be avoided as this carries a potential hazard, both from the propellant as well as from overdosage of the active therapeutic agent contained in the formulation.

6 Pharmaceutical Particulars

6.1 List of Excipients

Povidone, macrogol 600, apaflurane.

6.2 Incompatibilities

Incompatibilities were either not assessed or not identified as part of the registration of this medicine.

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 30 degrees Celsius, in a dry place away from direct sunlight.

6.5 Nature and Contents of Container

Intal (1 mg) CFC-Free.

Metered dose pressurised aerosol delivering 200 actuations after initial priming.

Intal Forte (5 mg) CFC-Free.

Metered dose pressurised aerosol delivering 112 actuations after initial priming.
An additional mouthpiece has been supplied in each pack to assist in the cleaning and maintenance of the CFC-Free inhaler.

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

Sodium cromoglycate is a white crystalline odourless powder. It is soluble in 20 parts water at 20°C. Chemically it is the disodium salt of 1, 3-bis (2 carboxychromon 5-yloxy)-2-hydroxypropane.

Chemical structure.


Molecular formula: C23H14Na2O11.
Mol Wt: 512.3.

CAS number.

15826-37-6.

7 Medicine Schedule (Poisons Standard)

Prescription Only Medicine (Schedule 4).

Summary Table of Changes