question: I have suffered from allergies my whole life.  Cats and dogs used to simply give me a runny nose, itchy eyes and dry throat.  Now I can barely breathe or see from the reactions and more things set me off.  I have tried everything from Benadryl to Zyrtec, to nasal sprays and shots.  Nothing has worked.  A friend of mine recently got a cortisone shot for his cat allergy and was fine withing hours.  How bad are the side effects, what are they, and is it worth the ability to finally breathe?