Oxacillin Uses

Oxacillin is prescribed to treat various bacterial infections in adults and children. This antibiotic is used when there is good reason to suspect that an infection is caused by bacteria that will be susceptible to this drug. This may involve having a "culture and sensitivity" test done. There are also some off-label (unapproved) uses for oxacillin, such as preventing any type of infection.

What Is Oxacillin Used For?

Oxacillin is a prescription antibiotic approved to treat a variety of infections. Given intravenously (by IV) or as an intramuscular injection (IM injection), oxacillin is typically administered in a hospital or other similar setting.
 
At one time, oxacillin and other similar antibiotics were the "latest and greatest" antibiotics used to treat serious infections caused by drug-resistant bacteria. However, oxacillin and other similar antibiotics are no longer as useful as they once were, as resistance has developed to these medications as well.
 
Oxacillin should be given only when there is a very good reason to suspect that an infection is caused by bacteria that will be susceptible to the drug. The best way to know this is if a "culture and sensitivity" test has been done. However, this type of testing takes time (often a few days), so some sort of antibiotic must be started while waiting for the results.
 
Bacteria have different resistance patterns in different regions in the country. This means that some bacteria may be susceptible to oxacillin in certain parts of the country but not in others. Depending on the particular resistance patterns in your area, your healthcare provider might assume that any staph infection would be resistant to oxacillin (in which case a different antibiotic would be chosen first, until the culture and sensitivity results come back). 
 
In many situations where a healthcare provider can accurately "guess" which type of bacteria is causing an infection, such as with a basic urinary tract infection, culture and sensitivity testing may not be performed at all. However, if such an infection does not clear up using the usual antibiotic based on the "best guess," then culture and sensitivity testing is a good idea.
 

Oxacillin Drug Information

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