I tried many drugs on the market. Allegra, Claritin, Benadryl... For last 3 years Zyrtec
was working fine, not great, but tolerable. After what happened on Monday the doctor put me on Prednisone for 5 days, so inflammation definitely goes away , but palpitations are so intense I can barely go 2 flights of stairs, forget jogging. She gave me samples of Xyzal, it works pretty fast. But I have a bad headache. So is the headache from Prednisone or from Xyzal? Should I keep a puppy?