Before taking oxacillin, tell your doctor if you are using any of the following drugs:
methotrexate (Rheumatrex, Trexall); or
probenecid (Benemid).
If you are using any of these drugs, you may not be able to use
oxacillin, or you may need dosage adjustments or special tests during treatment.
There may be other drugs not listed that can affect oxacillin. Tell your doctor about all
the prescription and over-the-counter medications you use. This includes vitamins, minerals,
herbal products, and drugs prescribed by other doctors. Do not start using a new medication
without telling your doctor.
Get emergency medical help if you have any of these signs of an allergic
reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have any of these serious side effects:
fever, sore throat, and headache with a severe blistering, peeling,
and red skin rash;
diarrhea that is watery or bloody;
fever, chills, body aches, flu symptoms;
easy bruising or bleeding, unusual weakness;
urinating less than usual or not at all;
severe skin rash, itching, or peeling;
agitation, confusion, unusual thoughts or behavior; or
seizure (black-out or convulsions).
Less serious side effects are more likely to occur, such as:
nausea, vomiting, stomach pain;
vaginal itching or discharge;
headache;
swollen, black, or "hairy" tongue; or
thrush (white patches or inside your mouth or throat).
Side effects other than those listed here may also occur. Talk to your
doctor about any side effect that seems unusual or that is especially bothersome.
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