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Etymology edit

From (a)cet(ic acid) +‎ [Term?] +‎ -izine (diphenylmethylpiperazine derivative).

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Noun edit

cetirizine (uncountable)

  1. (organic chemistry, pharmacology) A major metabolite of hydroxyzine, an antihistamine used in the treatment of allergies, hay fever, angioedema, and urticaria.

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