Antibiotics and Other Sulfonamides to Avoid If You Have a Sulfa Allergy Medically reviewed by Jurairat J. Molina, MD Sulfa drugs are synthetic (man-made) medications made from sulfanilamide that ...

A sulfa allergy occurs when a person has an allergic reaction to drugs that contain chemicals called sulfonamides. Symptoms may include a rash, difficulty breathing, and more. Sulfa is present in ...

No NNRTI-associated resistance demonstrated by either genotype or phenotype assay; however, given previous severe allergic reactions ... started ritonavir-boosted darunavir (DRV/r) with tenofovir ...

I recently was prescribed Bactrim (a sulfa drug) for an ear infection but didn’t know I am allergic to sulfa. I had a severe reaction to the drug: a raging, very itchy rash on most of my body.