Lisinopril and skin tests

For three months I have had a hacking cough. I was on pro-air, symbicort, nasanex, singulair, and allegra plus atenolol, lipitor. I went to my family dr. four times during this period and ended up with a pulmonologist last week and an allergist this week. My main doctor, a nice young doc, suggested it might be the linsinipril was causing the cough. His P.A. even had me off it a week. Bottom line is this: it takes longer than a week to find out if the cough is from Lisinopril and the cough does not come as a result of Lisinopril until you have a n infection or cold. I had been on the Lisinopril for two months when I got a cold at Christmas. I have been hacking ever since. Blood work and skin tests today revealed no allergies. I am to go off all allergy meds and the lisinopril. I am hopeful the hacking will subside.