How does this medication work? What will it do for me?

Trimethoprim and sulfamethoxazole both belong to the class of medications called antibiotics. This combination of antibiotics is used together to treat infections caused by certain bacteria. It is most commonly used to treat infections of the bladder, ear, sinus, skin, intestine, and lung. It works by killing the bacteria that cause these infections.

This medication may be available under multiple brand names and/or in several different forms. Any specific brand name of this medication may not be available in all of the forms or approved for all of the conditions discussed here. As well, some forms of this medication may not be used for all of the conditions discussed here.

Your doctor may have suggested this medication for conditions other than those listed in these drug information articles. If you have not discussed this with your doctor or are not sure why you are taking this medication, speak to your doctor. Do not stop taking this medication without consulting your doctor.

Do not give this medication to anyone else, even if they have the same symptoms as you do. It can be harmful for people to take this medication if their doctor has not prescribed it.

What form(s) does this medication come in?

Nu-Cotrimox is no longer being manufactured for sale in Canada. For brands that may still be available, search under trimethoprim – sulfamethoxazole.  This article is being kept available for reference purposes only. If you are using this medication, speak with your doctor or pharmacist for information about your treatment options.