Smoking accounts for adverse effect of antihypertensive medications on plasma lipids. A population-based study.

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Abstract
Mean plasma levels of total cholesterol, high density lipoprotein cholesterol, total-to-high density lipoprotein cholesterol ratio, and total triglycerides were determined in a representative sample of the adult Israeli Jewish population, excluding known diabetics and individuals with overt atherosclerotic morbidity (n = 1,153). Levels were compared in normotensive and untreated and treated hypertensive individuals by glucose tolerance category and smoking, after adjustment for sex, age, and body mass index. In the presence of normal glucose tolerance, lipid levels in the nonsmoking normotensive and treated hypertensive groups were similar, whereas in the smoking, treated hypertensive group, lipids were significantly affected, as indicated by the respective adjusted mean levels (mg/dl): total cholesterol, 219, 221, and 240; high density lipoprotein cholesterol, 45.0, 43.6, and 42.0; ratio, 5.2, 5.3, and 6.0; and triglycerides, 114, 107, and 144. In individuals with glucose intolerance, trends were the same with the exception of triglycerides, which were significantly elevated in the nonsmoking, treated hypertensive group also; the respective values were 217, 225, and 257 for total cholesterol; 45.1, 44.9, and 41.4 for high density lipoprotein cholesterol; 5.2, 5.5, and 6.8 for the ratio; and 133, 152, and 187 for triglycerides. Lipid disturbances in treated smokers were not due to heavier smoking or differences in dietary intake. We conclude that disturbance of plasma lipid profile in treated hypertensive individuals may be mainly due to an interaction with smoking, with an additional effect of glucose intolerance.