Take this medication by mouth as directed by your doctor, usually once a day. Unless otherwise directed by your doctor, drink plenty of fluids to help prevent side effects.

The dosage and treatment schedule are based on your medical condition and response to treatment. Carefully follow your doctor's directions for taking this medication.

Do not increase your dose or take this medication more often than prescribed. Your condition will not improve any faster, and your risk of serious side effects will increase.

It may take several months before you see a benefit from this drug.

Since this drug can be absorbed through the skin and lungs and may harm an unborn baby, women who are pregnant or who may become pregnant should not handle this medication or breathe the dust from the tablets.