A double-blind study of essential hypertension.
D002317:Cardiovascular Agents; D004311:Double-Blind Method; D004876:Ergot Alkaloids / Q000628:therapy*; D000075222:Essential Hypertension; D006973:Hypertension / Q000628:therapy*
D002317:Cardiovascular Agents; D004876:Ergot Alkaloids
ERGOT ALKALOIDS/therapy; HYPERTENSION/therapy