If i stopped taking bactrim (sulfamethoxazole and trimethoprim) yesterday is it possible to still get stevens-johnson syndrome?

Bactrim (sulfamethoxazole and trimethoprim): Steven johnson's syndrome may still occur within weeks of taking the antibiotic, but it is a very rare entity and i would not lose sleep over it if you are feeling well and do not have any current symptoms.

Very unlikely: Sjs is still possible for several days after the med is stopped but is highly unlikely to occur.