clonidine

clo·ni·dine

noun \ˈklän-ə-ˌdēn, ˈklōn-, -ˌdīn\

Definition of CLONIDINE

: an antihypertensive drug used in the form of its hydrochloride C₉H₉Cl₂N₃·HCl especially to treat essential hypertension, to prevent migraine headache, and to diminish opiate withdrawal symptoms