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Author: Admin | 2025-04-28
May rarely cause acute generalized exanthematous pustulosis (AGEP), a serious skin reaction characterized by fever and numerous small, superficial, non-follicular, sterile pustules, arising within large areas of edematous erythema. Inform patients about the signs of AGEP, and discontinue hydroxyzine at the first appearance of a skin rash, worsening of pre-existing skin reactions which hydroxyzine may be used to treat, or any other sign of hypersensitivity. If signs or symptoms suggest AGEP, use of hydroxyzine should not be resumed and alternative therapy should be considered. Avoid cetirizine or levocetirizine in patients who have experienced AGEP or other hypersensitivity reactions with hydroxyzine, due to the risk of cross-sensitivity. Adverse Reactions Side effects reported with the administration of hydroxyzine hydrochloride are usually mild and transitory in nature. Anticholinergic: Dry mouth. Central Nervous System: Drowsiness is usually transitory and may disappear in a few days of continued therapy or upon reduction of dose. Involuntary motor activity including rare instances of tremor and convulsions have been reported, usually with doses considerably higher than those recommended. Clinically significant respiratory depression has not been reported at recommended doses. Cardiac System: QT prolongation, Torsade de Pointes. In postmarketing experience, the following additional undesirable effects have been reported: Body as a Whole: Allergic reaction. Nervous System: Headache. Psychiatric: Hallucination. Skin and Appendages: Oral hydroxyzine hydrochloride is associated with Acute Generalized Exanthematous Pustulosis (AGEP) and fixed drug eruptions in postmarketing reports. Pruritus, rash, urticaria. Overdosage The most common manifestation of hydroxyzine overdosage is hypersedation. Other reported signs and symptoms were
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