Antibiotics and Other Sulfonamides to Avoid If You Have a Sulfa Allergy Sulfa drugs are synthetic (man-made) medications made from sulfanilamide that contain antibacterial properties. Sulfa drugs were ...

What is a staphylococcal infection? Staphylococcus aureus, or “staph,” are common bacteria that normally live on the skin. The bacteria also live harmlessly in the nasal passages of roughly 30 percent ...