Zyrtec and mold

I took Zyrtec for a few years for severe mold and pollen allergies. I loved the drug as it controlled my allergies much better than Allegra or Claritin. However, I recently stopped taking it after realizing it was causing dizzy spells, drowsiness/constant tiredness and heart flutters. Since I stopped taking it I have lost 6 pounds without making any alterations to my diet and exercising less than normal. This leads me to believe that my weight gain of 30 pounds in the last few years was also part of zyrtec's side effects.

I have wondered about the side effects of zyrtec - our daughter has been taking it for 5 year - the same amount of time she has been depressed, negative, etc and these symptoms just get worse as she grows older! I wish she wasn't taking zyrtec. I don't think it's just a coinincidence that her sadness, gloom, and depression began the same she started the zyrtec. She's only 50 lbs and the Dr has her on an adult dose (but she does have severe, severe allergies).