My son has been on Zyrtec for the past year - he is now 4. He th...

My son has been on Zyrtec for >9 months. He has been having severe mood swings telling me and his teachers that he is going to kill us and wants to cut heads off people. We have seen a psychologist and are trying to rule out some sort of behavioral/mental disorder. I have forgot for 4 days to give him his medicine and he has had a significant improvement in listening to me. Telling him no usually starts the tantrum. He has been complaining of headaches and we actually have an MRI scheduled in 2 weeks. I am thinking it is the Zyrtec. God I hope that is all it is!

We just had the same experience and he was only on it for a couple of months. Thank God for the Internet and people like you posting this