A healthcare provider may prescribe Bactrim® (sulfamethoxazole/trimethoprim) to treat several infections and to prevent one particular infection, Pneumocystis cariniipneumonia, in people with a weakened immune system. This prescription antibiotic is available in two forms:
Bactrim DS ("double strength") tablets -- 160 mg of trimethoprim and 800 mg of sulfamethoxazole.
Some people may wonder what the difference is between Bactrim DS vs. Bactrim. The "DS" stands for "double strength." Bactrim DS contains exactly twice as much of the active ingredients as regular Bactrim. There are no other important differences between the two products; taking two regular Bactrim tablets is the same as taking one Bactrim DS tablet.
(Click Bactrim and Bactrim DS to learn more about Bactrim versus Bactrim DS, including potential side effects, how these medications help to treat and prevent certain infections, and safety precautions to be aware of before starting treatment.)
Written by/reviewed by: Kristi Monson, PharmD;Arthur Schoenstadt, MD
Last reviewed by: KristiMonson, PharmD;
List of references (click here):
Bactrim [package insert]. Philadelphia, PA: AR Scientific, Inc.;2013 June.
Food and Drug Administration, Center for Drug Evaluation and Research. Electronic orange book: approved drug products with therapeutic equivalence evaluations. FDA Web site. Available at: http://www.fda.gov/cder/ob/. Accessed September 3, 2008.
Briggs GG, Freeman RK, Yaffe SJ. Drugs in Pregnancy and Lactation. 7th ed. Philadelphia (PA): Lippincott Williams & Wilkins;2005.
National Library of Medicine (US). Drugs and Lactation Database (LactMED). NLM Web site. Available at: http://toxnet.nlm.nih.gov/cgi-bin/sis/htmlgen?LACT. Accessed August 19, 2008.
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