No interactions: Cotrimoxazole does not decrease the effectiveness of birth control. Having said so, its important that you get properly diagnosed/ treated by your doctor. Misdiagnosed/incomplete treatment of UTI can result in other complications(infertility/other pelvic problems). Recommended dose of cotrimoxazole (sulfamethoxazole 800 mg + trimethoprim 160 mg) every 12 hours for 10 to 14 days for uti. Take care.
Answered 6/10/2014
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