People with sulfa allergies should avoid medications containing sulfonamides. Bactrim, Septra, and Silvadene are examples of drugs containing sulfa. Non-sulfa antibiotics like penicillins and ...

Avoid sulfa drugs like sulfamethoxazole if you have a sulfa allergy. Common sulfa allergy symptoms include rashes, itching, and hives. Stop taking the medication if you have a sulfa allergic reaction ...