Lisinopril‐Induced Nightmares

Abstract

Drug‐induced nightmares have been reported in the literature and are a known adverse effect of certain antihypertensive agents such as α‐agonists and β‐blockers. Data are limited, however, on the association of this adverse effect with angiotensin‐converting enzyme (ACE) inhibitors. We describe a 63–year‐old, obese woman, with no history of illicit drug abuse, alcohol abuse, or psychiatric illness, who developed nightmares after starting lisinopril 10 mg/day for blood pressure control. The drug was discontinued, triamterene‐hydrochlorothiazide was started, and her nightmares ceased. One year later, the patient continued to have no complaints of nightmares. At that time, however, her blood pressure was slightly elevated. Triamterene was discontinued, and lisinopril was restarted at a lower dose of 5 mg/day in addition to hydrochlorothiazide 25 mg/day. Her nightmares returned; however, the patient decided to continue taking the lisinopril and tolerate the nightmares. Use of the Naranjo adverse drug reaction probability scale indicated a probable relationship (score of 6) between the patient's development of nightmares and lisinopril therapy. The exact mechanism by which ACE inhibitors cause this drug reaction is not known. Clinicians should be aware of this potential adverse effect when monitoring patients receiving ACE inhibitors.