Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. David on can sulfa antibiotics ie bactrim affect oral birth control: Women on contraceptives are advised to use an alternate method of birth control whenever they take antibiotics. They should use the alternate method throughout the course of antibiotics & through. BACTRIM (sulfamethoxazole and trimethoprim) is a synthetic antibacterial combination product available in DS (double strength) tablets, each containing 800 mg sulfamethoxazole and 160 mg trimethoprim; in tablets, each containing 400 mg sulfamethoxazole and 80 mg trimethoprim for oral administration. U.S. Food and Drug Administration, Silver Spring, Maryland. 592,187 likes · 4,324 talking about this · 249 were here. The official page of the U.S. Food. how to bactrim oral contraceptives for how to bactrim oral contraceptives for UTRIP UTokyo Research Internship Program. CAMPUS Asia Program. Introducing The University of Tokyo. Earthquake Response / content -- /MAIN -- how to bactrim oral contraceptives for. Whether oral contraceptive pills containing desogestrel and gestodene are associated with a greater risk of venous thromboembolism than other combination oral contraceptives remains a point of. Yes, Bactrim DS can affect the combined oral contraceptives and reduce its effectiveness. ADDITIONAL CONTRACEPTION RECOMMENDED: The effectiveness of estrogen-containing oral contraceptives may be impaired by concomitant treatment with antimicrobial agents. In terms of the drug interaction, studies have shown that most antibiotics, on average, do not significantly reduce the concentrations of oral contraceptives in the body and the efficacy of birth control pills is unchanged. •oral contraceptives ( The Pill ) •indomethacin, a medicine used to treat arthritis and other conditions These medicines may be affected by BACTRIM or may affect how well it works. You may need to use different amounts of your medicine, or you may need to take different medicines. Your doctor will advise you. Your doctor or pharmacist has more information on medicines to be careful with or. With a recognized failure rate of 1% or less/year in women taking oral contraceptives as directed and 3%/year in typical populations, thousands of pregnancies occur each year in the millions of women taking oral contraceptives. Oral contraceptives (OCs) available in the United States include estrogen-progestin monophasic, biphasic, or triphasic combination products and progestin-only products.