I'm a 35 yr old male & I too have started this medication a handful of days ago to treat my high blood pressure which began due to a headache that came on so severe while having a bowel movement that i honestly thought i was dying since the pain seemed so severe and was so sudden (I thought my head was trying to collapse upon my brain or implode on itself which lead to vomiting the second time around). After a few days stay in the hospital (came in at 180/120) they prescribed 4 different meds for the HBP and one of them is this Lisinopril. Since taking it I feel not myself - moody, cloudy, a drunk-like feeling inside my head. It feels like reaction times are slowed due to not wanting to move too fast. I was hoping this would go away soon but I see i'm not alone w/ these feelings I also have arthritis in my back and I just can't believe all these side effects these so called 'approved' drugs have on the body.