Adverse effects of alcohol drinking were investigated in 240 hypertensive patients. Perceived interaction between alcohol and antihypertensive medication was reported by 9.9% of patients but the symptoms were rather mild. Except for the fact that the patients who perceived drug-alcohol interaction had higher dia-stolic blood pressure than the rest of the patients there was no evidence that alcohol use decreased compliance with antihypertensive treatment. Most heavy alcohol users believed that they should take their antihypertensive medication while drinking and reported doing so. Indiscriminate emphasis on avoidance of drug-alcohol combination might decrease blood pressure control of these patients.