Erythromycin: What It Is and How It Works

Erythromycin is an older antibiotic that belongs to the macrolide family. It fights bacteria by stopping them from making proteins they need to grow. Because it works differently from penicillin, doctors often turn to it when a patient is allergic to other antibiotics. You’ll see it prescribed for things like throat infections, skin wounds, and some lung bugs.

When Doctors Prescribe Erythromycin

Typical reasons to get erythromycin include strep throat, pneumonia, and certain sexually transmitted infections. It’s also used for acne that doesn’t respond to regular treatments. The drug comes in tablets, capsules, and liquid form, plus a topical ointment for skin use. Your doctor will pick the form that matches the infection’s location and severity.

Dosage depends on your age, weight, and the infection you’re fighting. Adults usually take 250‑500 mg every 6‑12 hours for 7‑14 days. Kids get a weight‑based dose, often around 30‑50 mg per kilogram per day, split into several doses. Always follow the schedule – skipping doses can let the bacteria bounce back.

Key Safety Tips and Interactions

Side effects are usually mild. The most common are stomach upset, nausea, and a taste that feels metallic. Some people get diarrhea or a rash. If you notice severe stomach pain, yellow skin, or a sudden fever, call your doctor right away.

Erythromycin can interact with many other meds. It blocks an enzyme called CYP3A4, which many drugs need to break down. Mixing it with statins, some heart medications, or certain anti‑depressants can raise the risk of serious side effects. Always tell your doctor about every prescription, over‑the‑counter pill, and supplement you take.

Pregnant or nursing mothers should use erythromycin only if the doctor says it’s necessary. The drug passes into breast milk, but most experts consider short courses safe. If you’re breastfeeding, discuss any concerns with your healthcare provider.

Store erythromycin at room temperature, away from moisture and direct sunlight. Keep the liquid form tightly sealed and discard any leftover medication after the recommended time. Throw away pills you no longer need – don’t share them with friends or family.

In short, erythromycin is a solid choice for many bacterial infections when other antibiotics aren’t suitable. Knowing the right dose, watching for side effects, and avoiding drug clashes can help you finish the course safely and get back to feeling well faster.