Skip to main content

Cromolyn nasal Side Effects

Medically reviewed by Last updated on Mar 1, 2024.

Applies to cromolyn nasal: nasal spray.

Serious side effects of Cromolyn nasal

Along with its needed effects, cromolyn nasal may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor as soon as possible if any of the following side effects occur while taking cromolyn nasal:


Other side effects of Cromolyn nasal

Some side effects of cromolyn nasal may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

Less common

For Healthcare Professionals

Applies to cromolyn nasal: nasal spray.


The most commonly reported adverse effects have included headache, bad taste in mouth, and a brief stinging or sneezing after use.[Ref]


Common (1% to 10%): Sneezing, nasal stinging, burning, irritation

Rare (less than 1%): Epistaxis, postnasal drip[Ref]


Frequency not reported: Anaphylaxis[Ref]

Hypersensitivity has been reported to develop after weeks to years of use.[Ref]

Nervous system

Common (1% to 10%): Headache[Ref]


Common (1% to 10%): Bad taste[Ref]


Rare (less than 0.1%): Rash[Ref]


1. MHRA. Medicines and Health Regulatory Agency. MHRA Drug Safety Update. 2013.

2. Product Information. Cromolyn Sodium Nasal (cromolyn nasal). Bausch and Lomb Americas, Inc. 2022.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.