Nafcillin Injection

Nafcillin injection is used to treat infections caused by certain types of bacteria. Nafcillin injection is in a class of medications called penicillins. It works by killing bacteria.

Antibiotics such as nafcillin injection will not work for colds, flu, or other viral infections. Taking antibiotics when they are not needed increases your risk of getting an infection later that resists antibiotic treatment.

🔔 How should this medicine be used?

Nafcillin injection comes as a powder to be mixed with fluid or as a premixed product and injected intravenously (into a vein). Nafcillin injection can also be given intramuscularly (into a muscle). It is usually given every 4 to 6 hours. The length of your treatment depends on the type of infection you have.

You may receive nafcillin injection in a hospital or you may administer the medication at home. If you will be receiving nafcillin injection at home, your healthcare provider will show you how to use the medication. Be sure that you understand these directions, and ask your healthcare provider if you have any questions.

You should begin to feel better during the first few days of treatment with nafcillin injection. If your symptoms do not improve or get worse, call your doctor.

Use nafcillin injection until you finish the prescription, even if you feel better. If you stop using nafcillin injection too soon or skip doses, your infection may not be completely treated and the bacteria may become resistant to antibiotics.

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🔔 Other uses for this medicine

Nafcillin injection is also sometimes used to prevent infection in people who are having certain types of surgery. Talk to your doctor about the risks of using this medication for your condition.

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

🔔 What special precautions should I follow?

Before receiving nafcillin injection,

• tell your doctor and pharmacist if you are allergic to nafcillin; penicillins; cephalosporin antibiotics such as cefaclor, cefadroxil, cefazolin, cefdinir, cefditoren (Spectracef), cefepime (Maxipime), cefixime (Suprax), cefotaxime (Claforan), cefotetan, cefoxitin (Mefoxin), cefpodoxime, cefprozil, ceftaroline (Teflaro), ceftazidime (Fortaz, Tazicef, in Avycaz), ceftibuten (Cedax), ceftriaxone (Rocephin), cefuroxime (Zinacef), and cephalexin (Keflex); any other medications; or any of the ingredients in nafcillin injection. Ask your pharmacist for a list of the ingredients.
• tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: other antibiotics; cyclosporine (Gengraf, Neoral, Sandimmune); probenecid (in Col-Probenecid, Probalan); tetracycline (Sumycin); and warfarin (Coumadin, Jantoven). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
• tell your doctor if you have or have ever had allergies, asthma, heart failure, or kidney or liver disease.
• tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while receiving nafcillin injection, call your doctor.

🔔 What special dietary instructions should I follow?

Unless your doctor tells you otherwise, continue your normal diet.