Cephalexin: What You Need to Know

Cephalexin is a common oral antibiotic that belongs to the cephalosporin family. It fights a wide range of bacterial infections, from skin wounds to ear infections. If your doctor has written a prescription for it, you’re probably dealing with a bug that needs a solid, short‑term attack.

How Cephalexin Works

Cephalexin stops bacteria from building their cell walls. Without a sturdy wall, the germs burst open and die. This action works on many Gram‑positive and some Gram‑negative bacteria, which is why it’s useful for conditions like strep throat, pneumonia, and urinary tract infections.

The drug is absorbed quickly from the gut, so it reaches effective levels in blood within an hour. That fast start is why doctors often choose it for infections that need quick relief.

Dosage and Side Effects

Typical adult dosing is 250 mg to 1 g every 6–12 hours, depending on infection severity. Kids get a dose based on weight, usually 25–50 mg per kilogram per day in divided doses. Always follow the exact schedule your doctor gives – skipping doses can let bacteria survive and become resistant.

Most people tolerate cephalexin well. Common side effects include mild stomach upset, diarrhea, or a slight rash. If you notice severe diarrhea that looks watery or has blood, stop the medicine and call a doctor right away – it could be a sign of C. difficile infection.

Allergic reactions are rarer but possible. Signs are itching, swelling, or trouble breathing. If any of these appear, treat it as an emergency and seek help immediately.

To keep side effects low, take cephalexin with food or a full glass of water. This helps the stomach absorb the drug gently and reduces stomach irritation.

Finish the entire prescription, even if you feel better after a few days. Stopping early can let hidden bacteria grow back, leading to a repeat infection that might need stronger antibiotics.

When buying cephalexin, use a reputable pharmacy. If you’re ordering online, look for licensed sellers that require a prescription. Cheap, unverified sources may sell counterfeit pills that don’t work or could be unsafe.

In summary, cephalexin is a reliable, easy‑to‑take antibiotic for many common infections. Stick to the prescribed dose, watch for side effects, and complete the course. If you have questions about interactions with other meds or health conditions, ask your pharmacist or doctor for clear advice.