What You Need to Know About Bactrim

What Should I Do If I Miss a Dose?

If you do not take your Bactrim as scheduled, take your missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not take a double dose. Try not to miss doses, as this increases the risk of developing an antibiotic-resistant infection.

Bactrim Strengths

Bactrim comes in the following strengths:
  • Bactrim tablets -- 80 mg of trimethoprim and 400 mg of sulfamethoxazole
  • Bactrim DS ("double strength") tablets -- 160 mg of trimethoprim and 800 mg of sulfamethoxazole.


Store Bactrim at room temperature, away from moisture and heat. Be sure to keep it in an airtight container. Keep this and all medications out of the reach of children.

Generic Availability of Bactrim

Currently, this medication is available in generic form.
(Click Generic Bactrim for more information.)
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