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What is cromolyn nasal spray?

Donna Hill Howes, RN
Family Practitioner

Cromolyn nasal spray (NasalCrom) reduces allergy symptoms by preventing cells in the air passages from releasing histamine. Histamine is a chemical used by the immune system. It causes swelling, itching, sneezing, and other symptoms of an allergic reaction. Cromolyn nasal spray is available without a prescription. 

This answer was adapted from Sharecare's award-winning AskMD app. Start a consultation now to find out what's causing your symptoms, learn how to manage a condition, or find a doctor. 

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.