Letter: Drug combinations in the treatment of hypertension.
D004357:Drug Synergism; D006801:Humans; D006973:Hypertension / Q000188:drug therapy*; D012110:Reserpine / Q000627:therapeutic use*; D014700:Verapamil / Q000627:therapeutic use*
D012110:Reserpine; D014700:Verapamil