Long-term effects of endralazine (BQ-22-708) in patients with renal impairment and hypertension.

Endralazine, a new peripheral vasodilator, was studied in 21 patients with hypertension and chronic renal failure. Nineteen patients had unacceptable control of hypertension with their previous therapy, and 2 were suffering adverse effects for other third line drugs. All patients continued to receive a beta-adrenergic blocking agent. Five patients failed to complete the study, two because of poor compliance, and 3 as a result of failure to control raised blood pressure. In the remaining 16 patients, satisfactory blood pressure reduction was seen at 6 months and was maintained in 12 patients followed for 18 months. Endralazine was well tolerated. No patient developed the lupus syndrome nor evidence of drug-induced immunological abnormality.