Dosage Information: 20 tabs of Sulfamethoxazole 800mg Trimethoprim 160 mg in each pack 20 Tabs should be finished in 10 days Each 160mg/800mg tab should be taken after 12 hours. The bacterial infection gets treated within a 10-day course. Occasionally, it may vary depending on the type of bacterial infection you are suffering from. https://shopemed.com/product/sulfamethoxazole-800mg-trimethoprim-160mg/