Ampicillin/sulbactam

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Ampicillin-2D-skeletal
Sulbactam
Sultamicillin schematic

Ampicillin/sulbactam is a combination antibiotic used to treat a variety of bacterial infections. This combination includes ampicillin, a penicillin-type antibiotic, and sulbactam, a beta-lactamase inhibitor. The addition of sulbactam to ampicillin enhances its effectiveness against beta-lactamase-producing bacteria, which are resistant to ampicillin alone.

Composition and Mechanism of Action[edit | edit source]

Ampicillin/sulbactam combines two active ingredients: ampicillin and sulbactam, typically in a 2:1 ratio. Ampicillin works by inhibiting the synthesis of bacterial cell walls, leading to cell lysis and death. However, some bacteria produce an enzyme called beta-lactamase, which can break down ampicillin, rendering it ineffective. Sulbactam, a beta-lactamase inhibitor, binds to and inactivates this enzyme, thereby protecting ampicillin from degradation. This synergistic combination allows for the effective treatment of infections caused by beta-lactamase-producing bacteria.

Indications[edit | edit source]

Ampicillin/sulbactam is indicated for the treatment of various infections caused by susceptible strains of bacteria, including:

It is also used in the treatment of infections caused by beta-lactamase-producing organisms that are resistant to ampicillin alone.

Administration[edit | edit source]

Ampicillin/sulbactam is administered intravenously or intramuscularly. The dosage and duration of treatment depend on the type and severity of the infection, as well as the patient's age and kidney function.

Side Effects[edit | edit source]

Common side effects of ampicillin/sulbactam include:

Serious side effects can include allergic reactions, Clostridium difficile-associated diarrhea, and anaphylaxis. Patients should be monitored for signs of allergic reactions and other adverse effects.

Drug Interactions[edit | edit source]

Ampicillin/sulbactam can interact with other medications, including:

Patients should inform their healthcare provider of all medications they are taking to avoid potential interactions.

Precautions[edit | edit source]

Before using ampicillin/sulbactam, patients should inform their healthcare provider if they have a history of allergies to penicillins or cephalosporins, kidney disease, or if they are pregnant or breastfeeding.

Conclusion[edit | edit source]

Ampicillin/sulbactam is a valuable antibiotic combination for the treatment of infections caused by beta-lactamase-producing bacteria. Its use should be guided by susceptibility testing and clinical judgment to ensure effectiveness and minimize the development of resistance.

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