cromolyn

:  a drug C₂₃H₁₄Na₂O₁₁ that inhibits the release of histamine from mast cells and is administered as an inhalant to prevent the onset of bronchial asthma attacks, as a nasal spray to treat allergic rhinitis, as eyedrops to treat allergic conjunctivitis, keratitis, or keratoconjunctivitis, and as an oral solution to treat mastocytosis—called also disodium cromoglycate, sodium cromoglycate