Can mouth ulcers be caused by allergic reaction to bactrim?

Answer:
Yes, they sure can. Bactrim, which is a sulpha drug, is known to cause allergic reactions and can cause swelling of the mouth and face, mouth sores, skin reactions, fever, and more.
Sulpha reactions also have cause fatal reactions called Stevens Johnson Syndrome.
First answer by ID3483196401. Last edit by ID3483196401. Question popularity: 213 [recommend question].