This medication passes into breast milk and may have undesirable effects on a nursing infant. The dosage is based on your medical condition and response to treatment. Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). If any of these effects persist or worsen, notify your doctor or pharmacist promptly. Do not drive, use machinery, or do anything that needs alertness or clear vision until you can do it safely. During pregnancy, this medication should be used only when clearly needed.