You should not use this medicine if you have had an allergic reaction to nafcillin or other types of penicillin. Some forms of this medicine contain dextrose and should not be used if you are allergic to corn or corn products.
If you store this medicine at home, keep it in the refrigerator. Do not freeze.
Keep all medicine away from children and never share your medicine with anyone.
Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any leftover medicine, containers, and other supplies. You will also need to throw away old medicine after the expiration date has passed.
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Make sure your doctor knows if you are also using tetracycline antibiotics (such as doxycycline, minocycline, Minocin®, or Sumycin®), cyclosporine (Sandimmune®, Neoral®), or a blood thinner such as warfarin (Coumadin®).