|Biological half-life||0.5 hours|
|Excretion||Biliary and renal|
|Chemical and physical data|
|Molar mass||414.476 g/mol|
|3D model (Jmol)|
Nafcillin sodium is a narrow-spectrum beta-lactam antibiotic of the penicillin class. As a beta-lactamase-resistant penicillin, it is used to treat infections caused by Gram-positive bacteria, in particular, species of staphylococci that are resistant to other penicillins.
As with all penicillins, serious life-threatening allergic reactions can occur.
Milder side-effects include:
- Nausea and vomiting
- Diarrhea, often due to suppression of normal gastrointestinal bacteria, which, on occasion, leads to a more serious super-infection with an organism like Clostridium difficile
- Abdominal pain
- Yeast infections (thrush) affecting the mouth and tongue or vagina
- Agranulocytosis, neutropenia
Nafcillin contains salts added as stability media. These added salts could cause edema or fluid accumulation. It would be prudent to avoid this medication if there were a concern for a congestive heart failure or kidney disease.
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