This registry is a place to share positive or negative side effects of using Allegra. If you directly experienced a side effect while using Allegra, then we encourage you to enter it here. Please note that entries here are the experiences of individual users, and in no way means that you or anyone else will experience the same side effect, since the same medication affects people in different ways. Please always contact your physician.
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August 18th
2005
8:12 PM
Since my friend started taking Allegra on a regular basis, he has increased appetite and is much more irritable. I read that some of the side effects is mood change, but don't know how common this negative behavior is.
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