no bactrim is not a treatment for any std other than a simple urinary tract infection. find out what kind of std your girlfriend has and be treated appropriately. most medical providers will treat a sexual partner even though you are not one of their patients. or you can go to a free clinic or planned parenthood and be tested. and treated. it is wise not to self treat any std since stds can be accompanied by more than one type and each type must be treated separately and appropriately. otherwise you will have a "gift" that keeps on giving. use condoms. use common sense.
can bactrim be used std. my old girlfriend was treated i was just notified