Cefadroxil — what it is and when you might get it

Cefadroxil is an oral first‑generation cephalosporin antibiotic. Doctors prescribe it for common infections like strep throat, uncomplicated skin infections, and some urinary tract infections. It kills bacteria by blocking their cell wall building, so it works best on bacteria that are still growing.

What Cefadroxil treats and how to use it

Typical uses include strep throat, skin and soft tissue infections (like cellulitis), and simple bladder infections. It comes as tablets, capsules, and a liquid (suspension) for kids. Most people can take it with or without food; taking it with food can cut down stomach upset.

Usual adult dosing ranges from 1 to 2 grams per day, often given as 500 mg twice daily or 1 g once daily depending on the infection. For children, common dosing is about 30–60 mg/kg per day divided every 12–24 hours. If you have reduced kidney function, your doctor will lower the dose or stretch the time between doses.

Side effects, allergies, and practical tips

Common side effects are mild: diarrhea, nausea, and sometimes a rash. If you get severe diarrhea, fever, or bloody stools, call your doctor — that could be a sign of C. difficile infection. People with a history of severe penicillin allergy should avoid cefadroxil because cross‑reactivity can occur. Less common but serious issues include severe allergic reactions (hives, swelling, trouble breathing) and blood changes like low white cells; both need urgent care.

Drug interactions are limited but worth noting: probenecid can raise cefadroxil levels, so your doctor may adjust dosing. Antibiotics can sometimes reduce the effectiveness of hormonal birth control—consider backup contraception if concerned. Always tell your prescriber about other medicines and supplements you use.

Practical tips: finish the full course even if you feel better early — stopping can let bacteria survive and come back stronger. If symptoms don’t improve within 48–72 hours, or they get worse, call your provider. For kids, shake the suspension well and store the reconstituted liquid in the fridge; most pharmacy instructions say to use it within about two weeks. Store tablets and capsules at room temperature away from moisture and heat.

If you have repeated or unusual infections, ask about a culture and sensitivity test — that tells the doctor which antibiotics will actually work. Pregnant or breastfeeding? Cephalosporins are commonly used in pregnancy, but check with your clinician before starting any antibiotic.

Missed dose? Take it as soon as you remember unless it’s almost time for the next dose. Don’t double up.

Cefadroxil is a straightforward, effective option for many common infections when used correctly. Talk with your healthcare provider about dosing, possible side effects, and whether this drug is a good fit for your situation.