商品名：Nemex, Strongid, Priex, Pyran, and Pyr-A-Pam
Antiparasitic drug. Pyrantel is in the class of tetrahydropyrimidines. Others in this class include morantel. Pyrantel acts to interfere with ganglionic neurotransmission via blocking with acetylcholine receptors and other sites. This causes paralysis of the parasites. Paralyzed worms are expelled from the intestinal lumen by peristalsis. Pyrantel is poorly water soluble and not absorbed systemically in ruminants, although some absorption occurs in monogastric animals. Most of the activity is confined to the intestinal lumen.
Pyrantel is indicated for treatment of intestinal nematodes. In horses, pyrantel is used for treatment and prevention of nematodes, including pinworms (Oxyuris equi), large roundworms (Parascaris equorum), large strongyles (Strongylus edentatus, S. equinus, and S. vulgaris), and small strongyles. When added to medicated feed it is used to control nematodes, including pinworms (O. equi), large roundworms (P. equorum), large strongyles (S. edentatus, S. vulgaris, and Triodontophorus species), and small strongyles. In pigs it is used for prevention of large roundworm (Ascaris suum) and prevention
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。
D0577 是多鹽類、多產品、多物種 umbrella record；若缺少完整產品情境，任何自動 mg/kg、mL、錠數、飼料濃度、重複間隔或停藥期都有錯配風險。
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）