About phenoxy methyl penicillin
Penicillin antibiotic
Used for
- Treats susceptible bacterial infections, including strep throat and skin infections
- Prevents recurrent rheumatic fever
Usual adult dose
Commonly 250–500 mg by mouth every 6 hours; dose and duration depend on infection.
Usual dose in children
Commonly 25–50 mg/kg/day by mouth in divided doses every 6–8 hours; dose depends on infection.
Common side effects
- Nausea, vomiting, or diarrhea
- Rash or itching
- Rare severe allergic reaction
Important warnings
- Not effective for viral infections such as colds or flu
- Avoid with previous serious allergy to penicillin
- Seek urgent care for breathing difficulty or facial swelling
- Complete the prescribed course unless a clinician advises otherwise
Pregnancy
Generally considered acceptable when clinically needed; available evidence has not shown increased birth-defect risk.
Breastfeeding
Usually compatible; small amounts enter milk and may rarely cause infant diarrhea or rash.
Interactions
- Probenecid can increase penicillin levels
- Methotrexate levels or toxicity may increase
- Warfarin effects may change; monitoring may be needed
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 It may be incomplete or out of date.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.