Ampicillin Sulbactam
Unasyn is a brand-name combination antibiotic consisting of ampicillin and sulbactam. It is used to treat various bacterial infections including respiratory tract infections, skin and soft tissue infections, intra-abdominal infections, and urinary tract infections by combining a penicillin-type antibiotic with a beta-lactamase inhibitor to broaden its spectrum of activity.
Unasyn is a broad-spectrum antibiotic injection used to treat moderate-to-severe bacterial infections.
Key facts at a glance
- RxNorm
- 57773
- Generic
- Unasyn
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Unasyn treats a range of bacterial infections including respiratory tract infections, skin and soft tissue infections, intra-abdominal infections, and urinary tract infections caused by susceptible organisms.
Ampectin combines ampicillin, which inhibits bacterial cell wall synthesis, with sulbactam, a beta-lactamase inhibitor that protects ampicillin from degradation, allowing it to be effective against a broader range of bacteria including many gram-positive, gram-negative, and anaerobic organisms.
Unasyn is administered by injection or IV. It should not be used in patients with penicillin allergies. Common side effects may include diarrhea, nausea, and rash. It is ineffective against viral infections and should only be used when a bacterial infection is confirmed or strongly suspected.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy