About cephalexin monohydrate
First-generation cephalosporin antibiotic
Used for
- Bacterial skin and soft-tissue infections
- Some throat and respiratory infections
- Urinary tract infections
- Certain bone infections
Usual adult dose
Commonly 250–500 mg every 6 hours, depending on infection; treatment duration varies.
Usual dose in children
Commonly 25–50 mg/kg daily in divided doses; severe infections may need more, up to 100 mg/kg daily.
Common side effects
- Diarrhea, nausea, or stomach discomfort
- Rash or itching
- Yeast infections
- Rarely, severe allergic reactions or antibiotic-associated colitis
Important warnings
- Not effective for viral infections such as colds or flu.
- Use may require adjustment in kidney impairment.
- Seek urgent care for facial swelling, breathing difficulty, or severe rash.
- Severe or persistent diarrhea may indicate serious bowel inflammation.
Pregnancy
Generally considered low risk when clinically needed; use should be guided by a healthcare professional.
Breastfeeding
Usually compatible; small amounts enter milk. Monitor infants for diarrhea, rash, or thrush.
Interactions
- Probenecid can increase cephalexin levels.
- Warfarin may have increased effects; monitoring may be needed.
- Metformin levels may rise.
- Cholera vaccine effectiveness may be reduced during antibiotic treatment.
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 It may be incomplete or out of date.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.