Eileen
Panic attacks are very unpleasant& my sympathy goes out to you. Side effects from any medication even Aspirin can sometimes be untolerable. Have you tried all the possible medications that your M.D. can prescribe for you; there are numerous types. Sometimes going to a Psychiatrist is beneficial. When you start to feel a panic attack, attempt to get your thoughts on something pleasant immediately. Sometimes Yoga can assist you also. Good luck.