Abstract
Cetirizine is a selective H1 histamine receptor antagonist derived from piperazine. Piperazine is a cyclic moiety molecule located in the structure of many drugs, including anxiolytics, antidepressants, and antipsychotics. Drug-induced dystonia is reported mostly due to antipsychotic and antiemetic drugs. It occurs due to the disruption of dopamine and acetylcholine balance in favor of acetylcholine. Although cetirizine is a relatively safe drug, it has rarely been reported to cause a dystonic reaction. To the best of our knowledge, there is no reported case of dystonia due to cetirizine in infancy. Here, we present a 7-month-old patient who developed a dystonic reaction after cetirizine administration.
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