• A Helgeland, P Leren, O P Foss, I Hjermann, I Holme, and P G Lund-Larsen.
• Am. J. Med. 1984 May 1; 76 (5): 802-5.

AbstractSerum glucose levels, triglyceride levels, and body weight are reported from a controlled drug trial in men, aged 40 to 49, with uncomplicated mild hypertension. The drug treatment started with hydrochlorothiazide alone, and methyldopa was added when necessary. If side effects occurred, methyldopa was replaced by propranolol. No detailed advice about diet, smoking, or weight reduction was given to any group. The untreated control subjects had a small increase in serum glucose levels during five years, from 6.08 to 6.21 mmol/liter. Those treated with hydrochlorothiazide alone and those treated with hydrochlorothiazide plus methyldopa had a small increase in serum glucose levels of the same order as that in the control subjects. However, those receiving the thiazide/propranolol combination experienced a sizeable increase in glucose levels, from 5.96 to 6.53 mmol/liter (p less than 0.001). This increase was significantly greater than the increase in the other groups (p less than 0.001). The thiazide/propranolol group also showed a significant increase in serum triglyceride levels (p less than 0.05). There was no difference in serum potassium levels in the different drug groups. The results indicate that moderate thiazide doses do not have significant effects on serum glucose levels in this age group. Propranolol in combination with thiazide seems to increase the level of serum glucose.

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