Read the Medication Guide provided by your pharmacist before you start using amphetamine 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 1 to 3 times a day. The first dose is usually taken when you wake up in the morning. If more doses are prescribed, take them as directed by your doctor, usually 4 to 6 hours apart.

If you are using this medication for weight loss, take it as directed by your doctor, usually 30 to 60 minutes before each meal.

Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day. Do not take this medication late in the evening because it may cause you to have trouble sleeping (insomnia).

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 amphetamine 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 your condition does not improve or if it worsens.