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The most common Atarax side effect is drowsiness which is usually temporary and may disappear within a few days or when the dosage is reduced. Other important Atarax side effects that may occur include dry mouth, twitches, tremors and convulsions.
Report Abuse. 1  RE: 2  It has been my experience having GAD (generalized anxiety disorder) that when I am on medication it seems to be alot worse. 3  Yes Xanax caused me to have a host of symtoms.  Yes, Xanax can cause anxiety and more panic 1  attacks. For the best answers, search on this site https://shorturl.im/0KvdW.