
Sulfa Drug Rash (Bactrim Rash): Symptoms, Severity, and When to Worry (2025 Guide)
Sulfa drugs, especially Bactrim (sulfamethoxazole/trimethoprim), are widely prescribed antibiotics used to treat common infections such as urinary tract infections (UTIs), respiratory infections, and skin conditions. Despite their effectiveness, sulfa medications frequently cause skin reactions—commonly referred to as a “Bactrim rash” or “Sulfa drug rash.” While most sulfa rashes are mild and easily managed, some reactions…