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Cromolyn sodium inhalation

Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.




This medication is used to prevent asthma attacks. It is not effective in treating an attack once it begins. Cromolyn is also used just before exercising to minimize breathing problems and before exposure to pollutants or substances that cause allergic reactions/breathing problems.

How To Use

The capsules are NOT to be swallowed. The contents of the capsule are inhaled using a special inhaler. You should receive an instruction sheet on the proper use of the inhaler device. Make sure you understand how to use it. Rinse your mouth after using the inhaler to help prevent dryness and relieve throat irritation. This medication works best when the level in your blood is kept at a constant level. Do this by taking each dose at evenly spaced intervals. Do not stop using this medication suddenly without consulting your doctor. Stopping the medication suddenly may lead to worsening of symptoms. If you are using a bronchodilator inhaler to open up the lungs, use it 20 minutes before taking cromolyn. Using the bronchodilator first will allow the cromolyn to penetrate deeper into the lungs for maximum effect. For preventing exercise-induced bronchospasm, take one of the doses before beginning exercise. It may take a few weeks before the full effects of this medication are noticed. Do not use cromolyn sodium after an asthma attack has started; it can make breathing more difficult.

Side Effects

May cause dizziness, headache, stomach upset, nasal congestion, sneezing, watering of eyes, increased urination. These effects should disappear as your body adjusts to the medication. If they persist or worsen, inform your doctor. Notify your doctor promptly if you experience: nosebleeds, painful urination, wheezing. In the unlikely event you have an allergic reaction to this drug, seek immediate medical attention. Symptoms of an allergic reaction include: rash, itching, swelling, dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.


Tell your doctor your medical history, especially about: lactase deficiency (problems digesting milk and dairy products), any allergies. Tell your doctor if you are pregnant before using this medication. It is not known if this drug is excreted into breast milk. Though, to date, there have been no reports of problems to nursing infants, consult your doctor before breast-feeding.

Drug Interactions

Tell your doctor about all the medications you may use (both prescription and nonprescription), especially about: other asthma medications. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately.


Do not allow anyone else to use this medication.

Missed Dose

If you miss a dose, take as soon as remembered. Take any remaining doses for that day at evenly spaced times. Do not "double-up" the dose to catch up.


Store at room temperature between 59 and 86 degrees F (15 to 30 degrees C) away from moisture and sunlight. Do not store in the bathroom. Keep aerosol and liquid forms from freezing. Do not puncture aerosol form.

Medical Alert

Your condition can cause complications in a medical emergency. For enrollment information call MedicAlert at 1-800-854-1166 (USA), or 1-800-668-1507 (Canada).