Zyrtec and close friends

I have a 10 year old son. When he was 2 the doctor put him on Zyrtec. I felt like it made him mean and very depressed. He had many outbursts and was not himself. I told the doctor and he looked at me like I was crazy. I took him off it and within about 3 days he was back to himself. When he was 6, the allergist wanted to put him on it again. I reminded him that I thought my son didn't tolerate it well and again he looked at me funny. We tried it for 4 weeks and my son was awful. He would sit in a ball on the couch and cry and cry for no reason. I got him off and again within 3-4 days he was back to himself. Since my experience I have had several CLOSE friends go through this similar experience. In fact my close friend just took her child off Zyrtec after me telling her our experience. Her son has been on it for 3 years. She has noticed a dramatic difference and after being off it for 5 days he said "Mommy for the first time I don't feel like bugs are crawling on my skin." If you have any intuition that your child is having any affect from Zyrtec you are right. Go with your gut and GET THEM OFF IT. There is other medicine out there!!!