商品名：Mydriacyl*, Tropicamide*
Inhibits acetylcholine at the iris sphincter and ciliary body muscles, causing mydriasis (pupil dilation) and cycloplegia (paralysis of the ciliary muscle).
Synthetic, short-acting antimuscarinic used for mydriasis and cycloplegia. It is the mydriatic of choice for intraocular examination due to its rapid onset (20–30 min) and short duration of action (4–12 h). Tropicamide is more effective as a mydriatic than as a cycloplegic and is therefore less effective than atropine in relieving ciliary body muscle spasm associated with uveitis. Use with care in patients with lens luxation.
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。
執行前須核對實際成品、濃度、容器、防腐劑、物種、年齡與眼部及全身狀態。 須由獸醫師分別判讀檢查散瞳、睫狀肌麻痺、手術、葡萄膜炎與眼壓風險，不能從單一研究或人用標示外推。 所有處方、監測與交互作用決策須以當地核准標示及個案評估重新建立。
DRUGAPI 劑量審查引用的獸醫官方標示（各標示只適用於其產品、物種與法域，不可互換）
依出現頻率分組；嚴重副作用獨立列出，臨床上需立即辨識。