Nafcillin (Nafcillin) (Injection) 10 g/100mL

Nafcillin injection is a penicillin-type antibiotic used to treat bacterial infections. It works by stopping bacterial growth. This prescription medication is administered via injection in healthcare settings. Commonly prescribed for staph infections, it targets penicillin-resistant bacteria.

Strength

10 g/100mL

Manufacturer / TM Owner

Sandoz Inc

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Pack/s

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Indications & Clinical Uses

Nafcillin injection is primarily used to treat infections caused by penicillin-resistant staphylococci, including skin and soft tissue infections, pneumonia, and bone infections. It may also be prescribed for endocarditis or septicemia when caused by susceptible strains. Patients often ask, what is nafcillin used for, and it is typically reserved for infections that do not respond to other antibiotics. This medication is not effective against viral infections like the common cold.

Side Effects

After administration, nafcillin begins working to reduce infection symptoms such as fever, swelling, and pain. Patients may notice an improvement in energy levels and reduced localized discomfort as the infection clears. The injection is designed for direct delivery into the bloodstream, ensuring rapid onset of action. Some individuals may experience mild discomfort at the injection site.

Precautions & Warnings

Nafcillin should only be handled and administered by trained healthcare professionals. Patients with a history of penicillin or cephalosporin allergies should inform their provider before use. Proper storage and handling of the injection are essential to maintain potency. Always disclose all medications and health conditions to your healthcare provider.

Avoid Interactions

Nafcillin may interact with other antibiotics, blood thinners, or medications that affect liver enzymes. Combining nafcillin with certain drugs can alter their effectiveness or increase side effects. Alcohol use during treatment may reduce efficacy and increase side effects. Always review your full medication list with a healthcare provider before starting nafcillin.

Frequently Asked Questions

Nafcillin injection is used to treat bacterial infections caused by penicillin-resistant staphylococci, such as skin infections or pneumonia.

Nafcillin injection is given directly into a vein by a healthcare professional in a clinical setting.

No, nafcillin is an antibiotic and only treats bacterial infections, not viruses like colds or flu.

Inform your doctor about any allergies, especially to penicillin or cephalosporins, and all medications you are currently taking.

Yes, nafcillin may interact with blood thinners, certain antibiotics, and medications affecting liver enzymes.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated: 29 Jul 2026

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