Ticrynafen and hydrochlorothiazide in hypertension.

In a double-blind study, 28 patients having mild to moderate essential hypertension were randomly assigned to a 6-week regimen of ticrynafen, hydrochlorothiazide, or placebo. Blood pressure fell after ticrynafen and hydrochlorothiazide. Serum uric acid fell strikingly with ticrynafen whereas it rose with hydrochlorothiazide. Serum potassium declined very little with ticrynafen; much less than with hydrochlorothiazide. Serum creatinine and blood urea nitrogen rose slightly more with ticrynafen than with hydrochlorothiazide. There were no clinical adverse effects to either of the medications. Ticrynafen appears to be an effective antihypertensive with a substantial hypouricemic effect.