Cromolyn
Cromolyn is a mast cell stabilizer used for preventing allergic and inflammatory reactions, including in the gastrointestinal tract.
Cromolyn is a mast cell stabilizer used primarily for GI conditions involving mast cell overactivity.
Key facts at a glance
- ATC
- A07EB01
- RxNorm
- 42612
- Generic
- Cromolyn
- Class
- atc-a07
- Brands
- Nasalcrom, Gastrocrom
- Availability
- rx
- Lactation
- unknown
- Routes
- oral, nasal, ophthalmic
- Forms
- capsule, spray, solution, powder
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Primarily used for gastrointestinal conditions involving mast cell activation, including systemic mastocytosis with GI involvement and allergic gastroenteritis or colitis. Also available in inhaled, nasal, and ophthalmic formulations for asthma, allergic rhinitis, and ocular allergies.
Acts as a mast cell stabilizer by preventing the degranulation and release of inflammatory mediators such as histamine and leukotrienes. Works locally at the site of administration with minimal systemic absorption.
Must be used prophylactically rather than for acute symptom relief, as it prevents new inflammatory reactions rather than treating existing symptoms. Generally well-tolerated with few systemic side effects due to poor absorption. Effective use requires consistent dosing as directed by a healthcare provider.
Official drug label
WellAlly may earn a referral fee from linked resources at no extra cost to you. Editorial content is never influenced by commercial relationships.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy