Erythromycin is a topical antibiotic that dermatologists have prescribed for decades to calm inflamed, red, and pus-filled pimples. It works by killing the bacteria Cutibacterium acnes and reducing inflammation. But it’s not a first-choice treatment anymore — here’s why, and when it still makes sense. How Erythromycin Actually Works on Acne Erythromycin belongs to the …
