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

Read all Zyrtec side effects

Posted at 1:45 PM on Jan 22, 2008 by floridamom, #26526

My son has been on Zyrtec for the past year - he is now 4. He the sweetest disposition one minute and is a monster the next hating us and wishing we were dead. We assumed that it was his age and possibly a behavior disorder until I read the other entries. We took him off immediately and he is back to the kid we lost last year. This needs to be taken seriously. When I researched the side effects on the drug website they do not mention behavior issues as a possible side effect. My son will live with a runny nose and a smile on his face.

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Reply about 1 year ago on Mar 10, 2008 by frustratedmom, #5452

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!

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Reply about 1 year ago on Apr 09, 2008 by dontvail, #6930

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

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