 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  for a short time (a few weeks) in people who have not lost enough weight with other treatments (such as dieting, other drugs, group programs). It may work by decreasing your appetite. How to use amphetamine sulfate oral 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 </s>