Hi, may I answer your health queries right now ? Please type your query here... I have been on 20 mg lisinopril(once a day) since 9-15-10 with no side affects. Recently it is making me sick to where I can not function (dizzy, upset stomach, breathing difficut , anxious, shaky). I decided to not take it for ONE day (felt MUCH MUCH better) took it the next day(same AWFUL symptons). Quit the next day (MUCH BETTER). Is this normal or did they re-fill the wrong medicine in Dec 10, 2010.