About ampicillin trihydrate
Penicillin antibiotic
Used for
- Treats susceptible bacterial infections, including respiratory, urinary, and gastrointestinal infections.
- May treat certain serious infections when prescribed according to culture results.
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, divided every 6 hours; dose depends on infection.
Common side effects
- Nausea, vomiting, or diarrhea
- Skin rash
- Allergic reactions, rarely severe
- Antibiotic-associated colitis
Important warnings
- Not effective for viral infections.
- Avoid with serious penicillin allergy; cross-reactions can occur with cephalosporins.
- Seek urgent care for breathing difficulty, facial swelling, or severe rash.
- Complete the prescribed course; inappropriate use promotes antibiotic resistance.
Pregnancy
Generally considered acceptable when clinically needed; use under a healthcare professional’s guidance.
Breastfeeding
Usually compatible; monitor the infant for diarrhea, rash, or thrush.
Interactions
- Allopurinol may increase the chance of skin rash.
- Probenecid can increase ampicillin levels.
- May reduce effectiveness of live oral typhoid vaccine.
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 It may be incomplete or out of date.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.