About cephalexin
First-generation cephalosporin antibiotic
Used for
- Treats certain bacterial infections, including skin, throat, and urinary infections
Usual adult dose
Usually 250–500 mg every 6 hours, depending on infection.
Usual dose in children
Usually 25–50 mg/kg daily in divided doses; some infections need higher doses.
Common side effects
- Diarrhea
- Nausea or vomiting
- Stomach discomfort
- Rash
Important warnings
- Not effective against viral infections such as colds or flu.
- Tell clinicians about serious penicillin or cephalosporin allergies.
- Dose may need adjustment in kidney disease.
- Seek urgent care for severe allergic reactions or severe, persistent diarrhea.
Pregnancy
Generally considered usable when needed; clinical assessment should guide treatment.
Breastfeeding
Usually compatible; monitor the infant for diarrhea, thrush, or rash.
Interactions
- Probenecid can increase cefalexin levels.
- Warfarin may have increased effects; monitoring may be needed.
- Metformin levels may increase.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.