Read the Medication Guide provided by your pharmacist before you start using methamphetamine and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

• Take this medication by mouth with or without food as directed by your doctor, usually once or twice daily. During treatment, your doctor may occasionally recommend stopping the medication for a short time to see if there are any changes in your behavior and whether the medication is still needed.
• Do not take this medication late in the day because it may cause you to have trouble sleeping.
• If you suddenly stop using this medication, you may have withdrawal symptoms (such as severe tiredness, sleep problems, mental/mood changes such as depression). To help prevent withdrawal, your doctor may lower your dose slowly. Withdrawal is more likely if you have used methamphetamine for a long time or in high doses. Tell your doctor or pharmacist right away if you have withdrawal.
• When this medication is used for a long time, it may not work as well. 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 you do not get better or if you get worse.