 <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]  parts of the brain. This medication is an appetite suppressant and belongs to a class of drugs called sympathomimetic amines. How to use Diethylpropion HCL ER Take the immediate-release form of this medication by mouth as directed by your doctor, usually 3 times a day (1 hour before meals). If late-night eating is a problem, your doctor may direct you to take another dose in the evening. Taking this medication late in the day may cause trouble sleeping (insomnia). The extended-release form of diethylpropion is usually taken once a day in the mid-morning. Do not crush or chew extended-release tablets. Doing so can release all of the drug at once, increasing the risk of side effects. Swallow the tablets whole. The dosage is based on your medical condition and response to therapy. Your doctor will adjust the dose to find the best dose for you. Use this medication regularly and exactly as prescribed in order to get the most benefit from it. To help you remember, take it at the same time(s) each day. Diethylpropion is usually taken for only a few weeks at a time. It should not be taken with other appetite suppressants (see also Drug Interaction section </s>