of these patients , 18 were then randomly assigned to antihypertensive treatment with labetalol at doses that were increased at weekly intervals ( 100 , 200 , 400 , 600 mg bid ) and 17 , with hydrochlorothiazide ( hctz ) ( 25 or 50 mg bid ) as needed for control of hypertension .
C0020261
hydrochlorothiazide
C0020538
hypertension