Lisnopril causing hair thinning and weight gain?

I just started taking lisnopril and I'm always tired. Almost feel asleep at the wheel. Is this a side effect?

That's a low dosage. But yes I had fairly significantly weight gain on this drug, and inablity to loose the weight despite diet and six days a week, hour a day exercise. I am in my early 30's never had a weight problem before. I went from 115 to 130 in three months, I'm only 5'2. I also had the hair loss. Docs don't want to admit weight gain is a side effect, but its one of the listed ones, although its rare. They blamed me for the weight gain for months, saying I was overeating, getting older, etc.