About cephalexin as monohydr
First-generation cephalosporin antibiotic
Used for
- Treats susceptible bacterial infections, including skin, throat, ear, and urinary infections.
Usual adult dose
Usually 250–500 mg every 6 hours, depending on infection and local guidance.
Usual dose in children
Usually 25–50 mg/kg daily in divided doses; some infections need higher doses.
Common side effects
- Diarrhea, nausea, or stomach discomfort
- Rash or itching
- Rarely, severe allergic reaction or antibiotic-associated colitis
Important warnings
- Not effective against viral infections such as colds or flu.
- Tell clinicians about severe penicillin or cephalosporin allergy.
- Dose may need adjustment with reduced kidney function.
- Seek urgent care for breathing difficulty or severe, persistent diarrhea.
Pregnancy
Generally considered acceptable when clinically needed; available evidence has not shown increased birth-defect risk.
Breastfeeding
Usually compatible; small amounts enter milk. Monitor for infant diarrhea, rash, or thrush.
Interactions
- Warfarin: may increase bleeding risk; monitoring may be needed.
- Probenecid can increase cephalexin levels.
- Metformin levels may rise in some people.
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 It may be incomplete or out of date.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.