Various aspects of carbohydrate and lipid metabolism were studied in two groups of patients with mild hypertension before and after 6 months' treatment with either lisinopril (n = 10) or hydrochlorothiazide (n = 10). A significant reduction of arterial blood pressure was seen after both treatment regimens. Circulating plasma glucose, insulin, C-peptide and triglyceride concentrations were measured at hourly intervals from 8.00 a.m. to 5.00 p.m. in patients on an isocaloric diet (35 cal/kg/day). Plasma glucose concentrations remained unchanged, while insulin and C-peptide concentrations were higher in association with hydrochlorothiazide treatment. Conversely, lisinopril-treated patients had lower C-peptide concentrations after treatment. The changes in daylong plasma glucose and insulin-stimulated glucose uptake increased after hydrochlorothiazide treatment and decreased following lisinopril. Lastly, plasma cholesterol concentrations did not change after lisinopril therapy, whereas plasma high density cholesterol decreased as a result of hydrochlorothiazide treatment.
Blood Glucose C-Peptide