Oxacillin Uses

How Does This Medicine Work?

Oxacillin belongs to a group of medications known as penicillinase-resistant, beta-lactam antibiotics. It is meant for treating infections caused by staphylococci bacteria that have developed resistance to most other penicillins (by producing an enzyme known as penicillinase).
 
However, as is often the case, some bacteria have developed further resistance, and penicillinase-resistant, beta-lactam antibiotics are not effective against such bacteria. Most notably, methicillin-resistant Staphylococcus aureus (MRSA) is an example of a type of bacteria that is resistant to penicillinase-resistant, beta-lactam antibiotics, including methicillin or oxacillin. Oxacillin should not be prescribed to treat infections where MRSA is suspected.
 

Is It Safe for Children to Use Oxacillin?

This drug is approved for use in children. Because the dosage used in children is based on weight, it is important that your healthcare provider has an accurate weight for your child. It may be best to actually weigh the child, as a child's weight frequently changes.  
 

Off-Label Uses for Oxacillin

On occasion, your healthcare provider may recommend this medication for something other than treating the infections discussed in this article. This is known as an "off-label" use. Using oxacillin to prevent any type of infection would be an off-label use.
 

Oxacillin Drug Information

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