商品名：Vetisulid
Sulfonamide antibacterial. Sulfonamides compete with para-aminobenzoic acid (PABA) for an enzyme that synthesizes dihydrofolic acid in bacteria. It is synergistic with trimethoprim. Bacteriostatic. Like other sulfonamides, it has a broad spectrum of activity, including gram-positive bacteria, gram-negative bacteria, and some protozoa. However, when used alone, resistance is common.
Sulfachlorpyridazine is used as a broad-spectrum antimicrobial to treat or prevent infections caused by susceptible organisms. Infections treated may include pneumonia, intestinal infections (especially coccidia), soft tissue infections, and UTIs. However, resistance is common. The use of sulfachlorpyridazine has not been reported for small animals. It is used primarily for pigs and cattle. However, other drugs may be equally effective.
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。
先核對活性本體或鈉鹽、完整成品、所有活性成分、濃度、劑型及現行標籤。 確認物種、生產類別、年齡與反芻狀態、疾病、病原及藥敏或局部抗藥性。 食用動物另核對產乳、產蛋、屠宰、法域、殘留容許與該成品停藥要求。 區分核准、撤銷、法規收載與實際供應，不得由商品名或歷史劑型推定現貨。 不得把鄰近磺胺類、複方、散裝原料、體外試驗、殘留研究或類別摘要轉成處方。
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。