商品名：Piriton*
Binds to H1 histamine receptors to prevent histamine binding.
Management of allergic disease and prevention and early treatment of anaphylaxis. Commonly used as premedication before transfusions and certain chemotherapeutic agents. Specific doses for dogs and cats have not been determined by pharmacokinetic studies. Use with caution in cases with urinary retention, angle- closure glaucoma and pyloroduodenal obstruction.
劑量數字暫停提供：VetPro 的劑量改依 DRUGAPI 藥物資料庫對外的內容，DRUGAPI 目前不提供可直接計算的劑量。下方列出 DRUGAPI 的審查結論與劑量審查引用的來源；計算機可手動輸入劑量換算。
現行 2–4 mg/kg 是抗組織胺錯藥自動值。公開獸醫方案依特定中毒、肝腸循環肝毒物或犬慢性腸病分流，單位、頻率與療程差異極大，不能合併成 standard。
依出現頻率分組；嚴重副作用獨立列出，臨床上需立即辨識。