sulfame
It sounds like Septra or Bactrim.
Oh, dude, mixing Effexor XR with sulfamethoxazole-trimethoprim (Bactrim) can increase the risk of serotonin syndrome, a potentially serious condition. It's like mixing peanut butter with pickles - not a great combo. Always check with your doctor or pharmacist before mixing medications, because you don't want your body doing the medication equivalent of a bad stand-up comedy routine.