What Are The Side Effects Of Loratadine?

I was prescribed Betnasole and Loretidine for polips. I also have severe sinusitis with fungal growth which will be surgically cleaned a week from now. The Loretidine gave me severe side effects - chest contraction and breathlessness. I completed the steroid (5 DAYS ONLY) and anti-allergic courses over FOUR weeks ago, BUT I AM STILL FEELING NAUSEATED AND DISCOMFORT IN THE STOMACH EVERY NOW AND THEN - PARTICULARLY AFTER HALF AN HOUR TO 3 HOURS AFTER MEALS. COULD THIS BE A SIDE EFFECT OF THE MEDICATION. My LFT, blood counts, ultrasound of the abdomen are all normal.