Zyrtec and itching skin

I started taking zyrtec a few days ago for seasonal allergies. I had tried the claritin (loratidine) before and it didn't seem to really help me much. I was avoiding the zyrtec because I knew it could potentially make me drowsy and I didn't want to be tired if I was working. I'm a pharmacist so I decicded to try it knowing the potential side effects. It works really well for me - but I started having really vivid strange - and disturbing - dreams. It has only been a week and they havent been too bad so far - but I am going to monitor it and if they get worse I will stop and try something else. The reason this is so strange is I don't normally dream much at all. I maybe remember bits and pieces of a dream - these are wierd and strange and make absolutely no sense. These dreams seem so real and are so clear - I can remember every detail of what was done and said.