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.
|Elimination half-life||0.5 hours|
|Excretion||Biliary and renal|
|CompTox Dashboard (EPA)|
|Chemical and physical data|
|Molar mass||414.476 g/mol g·mol−1|
|3D model (JSmol)|
Nafcillin is considered therapeutically equivalent to oxacillin, although one retrospective study found greater rates of hypokalemia and acute kidney injury in patients taking nafcillin compared to patients taking oxacillin.
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.
- Palmer DL, Pett SB, Akl BF (March 1995). "Bacterial wound colonization after broad-spectrum versus narrow-spectrum antibiotics". Ann. Thorac. Surg. 59 (3): 626–31. doi:10.1016/0003-4975(94)00992-9. PMID 7887701.
- Tan AK, Fink AL (January 1992). "Identification of the site of covalent attachment of nafcillin, a reversible suicide inhibitor of beta-lactamase". Biochem. J. 281 (1): 191–6. doi:10.1042/bj2810191. PMC 1130660. PMID 1731755.
- Viehman, J. Alexander; Oleksiuk, Louise-Marie; Sheridan, Kathleen R.; Byers, Karin E.; He, Peimei; Falcione, Bonnie A.; Shields, Ryan K. (May 2016). "Adverse Events Lead to Drug Discontinuation More Commonly among Patients Who Receive Nafcillin than among Those Who Receive Oxacillin". Antimicrobial Agents and Chemotherapy. 60 (5): 3090–3095. doi:10.1128/AAC.03122-15. PMC 4862451. PMID 26976858.
- Pham P, Bartlett JG (January 2, 2009). "Nafcillin". Point-of-Care Information Technology ABX Guide. Johns Hopkins University. Retrieved on July 10, 2009. Freely available with registration.
- Bonow RO, Carabello BA, Kanu C, et al. (August 2006). "ACC/AHA 2006 guidelines for the management of patients with valvular heart disease: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (writing committee to revise the 1998 Guidelines for the Management of Patients With Valvular Heart Disease): developed in collaboration with the Society of Cardiovascular Anesthesiologists: endorsed by the Society for Cardiovascular Angiography and Interventions and the Society of Thoracic Surgeons". Circulation. 114 (5): e84–231. doi:10.1161/CIRCULATIONAHA.106.176857. PMID 16880336.
- JA Mohr. (1979). Nafcillin-associated hypokalemia. JAMA
- Lang CC, Jamal SK, Mohamed Z, Mustafa MR, Mustafa AM, Lee TC (June 2003). "Evidence of an interaction between nifedipine and nafcillin in humans". Br J Clin Pharmacol. 55 (6): 588–90. doi:10.1046/j.1365-2125.2003.01789.x. PMC 1884262. PMID 12814453.