About cephalexin as cephalexin monohydrate
First-generation cephalosporin antibiotic
Used for
- Treats susceptible bacterial infections, including skin, throat, and urinary infections.
Usual adult dose
Usually 250–500 mg by mouth every 6 hours, depending on infection.
Usual dose in children
Usually 25–50 mg/kg/day by mouth in divided doses; severe infections may need higher doses.
Common side effects
- Diarrhea
- Nausea or vomiting
- Stomach discomfort
- Rash
Important warnings
- Not effective against viral infections.
- Serious allergic reactions can occur, especially with cephalosporin allergy.
- Seek urgent care for severe or bloody diarrhea.
- Dose adjustment may be needed with kidney impairment.
Pregnancy
Generally considered acceptable when clinically needed; evidence has not shown a clear increase in birth defects.
Breastfeeding
Usually compatible; small amounts enter milk. Monitor for infant diarrhea, rash, or thrush.
Interactions
- Probenecid can increase cephalexin levels.
- Warfarin may have increased anticoagulant effects.
- 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 It may be incomplete or out of date.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.