I've been on Lisinopril for almost 2 months. At first I was so tired that I needed a nap about 4 hours after taking it. The dry cough came and went more like a tickle. Went back to the doctor and complained that the sleep rx she gave me didn't work so she prescribed Trazadone 10mg and my Lisinopril is 20mg daily. I awoke the next day with nausea, diarrhea, headache. Decreased Trazadone to 1/2 or 1/4 but the diarrhea has not quit. I called the clinic and was told to stop the Trazadone(who needs sleep right?) and take 1/2 of Lisinpril daily. The diarrhea and the cough will not go away and the cough will come at any time. I'd rather take my chances with the hypertension than this. I am an obese woman but have lost 30 pounds in the last 5 months, so as I continue to lose hopefully I won't need any meds.