 <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]  belongs to a class of drugs known as stimulants. It can help increase your ability to pay attention, stay focused on an activity, and control behavior problems. It may also help you to organize your tasks and improve listening skills. How to use Quillichew ER Read the Medication Guide provided by your pharmacist before you start taking methylphenidate 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 daily in the morning. Chew thoroughly and then swallow. Taking this medication late in the day may cause trouble sleeping (insomnia). Do not drink alcoholic beverages while taking this medication. Drinking alcohol may release all of the drug at once, increasing the risk of side effects. The dosage is based on your medical condition and response to treatment. To reduce your risk of side effects, your doctor may direct you to start this medication at a low dose and gradually increase your dose. Follow your doctor's instructions carefully. Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time each day. During treatment, your doctor may occasionally recommend stopping the medication for a short time to see whether there </s>