See also Warning section.

Read the Medication Guide available from your pharmacist. Consult your doctor or pharmacist if you have any questions.

Take this medication by mouth as directed by your doctor, usually 1 to 4 times daily. The larger portion of the total daily dose may be taken at bedtime to help reduce daytime sleepiness. The dosage is based on your medical condition, age, and response to treatment.

To reduce your risk of side effects (such as drowsiness, dry mouth, dizziness), your doctor may direct you to start this medication at a low dose and gradually increase your dose. Follow your doctor's instructions carefully.

Take this medication regularly in order to get the most benefit from it. To help you remember, take it at the same time(s) each day. Do not increase your dose or use this drug more often or for longer than prescribed. Your condition will not improve any faster, and your risk of side effects will increase.

This medication may not work right away. You may feel some benefit the first week. However, it may take up to 4 weeks before you experience the full effect.

Keep taking this medication even if you feel well. Do not suddenly stop taking this medication without consulting your doctor. Some conditions may become worse when the drug is abruptly stopped. Your dose may need to be gradually decreased.

When this medication is used for a long time, it may not work as well. Your doctor may need to increase your dose or change your medication. Talk with your doctor if this medication stops working well.

Though it helps many people, this medication may sometimes cause addiction. This risk may be higher if you have a substance use disorder (such as overuse of or addiction to drugs/alcohol). Take this medication exactly as prescribed to lower the risk of addiction. Ask your doctor or pharmacist for more details.

Tell your doctor if your condition lasts or gets worse (such as nervousness or feelings of sadness get worse, or you have thoughts of suicide).