I have been breaking out in hives for about a month now and have no idea way. I dont have any pets nor have I been around any. I haven't eat any shellfish or anything else out the normal. Everyday is typical routine. I havent been anyway new or ate anything different. I do take medication for blood pressure and cholesterol. They are Lisinopril, Amlodipine, and Lovastatin. I have been taking these medicines for bout 6 months now. Could they be causing the hives? I didnt get any hives when I started them just been getting them everyday for the last month.