a drug, CHNo, that inhibits the activity of epinephrine and similar substances, used in controlling irregular heartbeats and in treating angina pectoris
See propranolol in American Heritage Dictionary 4
(prō-prănˈə-lôlˌ, -lōlˌ, -lŏlˌ)
noun
A drug, C16H21NO2, that blocks beta-adrenergic activity, used to treat hypertension, angina pectoris, and cardiac arrhythmia and to prevent migraine headaches.