White to off white intramammary suspension. Each 4.5 g intramammary syringe contains the following active ingredients: Penethamate Hydriodide 100 mg (equivalent to 77.2 mg penethamate), Benethamine Penicillin 280 mg (equivalent to 171.6 mg penicillin) and Framycetin sulphate 100 mg (equivalent to 71.0 mg framycetin).