 <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] one belongs to a class of drugs known as COMT inhibitors. Many people taking levodopa for Parkinson's have problems with the effects of the levodopa wearing off between scheduled doses, causing symptoms to return or worsen. Entacapone blocks a certain natural substance (COMT enzyme) that breaks down the levodopa in the body. This effect allows the levodopa to last longer in the system so that it doesn't wear off before the next dose. How to use Entacapone Take this medication by mouth with or without food as directed by your doctor, usually with each prescribed dose of levodopa/carbidopa (up to 8 times daily). The dosage is based on your medical condition and response to treatment. Use this medication regularly to get the most benefit from it. To help you remember, take it at the same times each day. Do not suddenly stop taking this medication unless instructed to do so by your doctor. Doing so may cause your Parkinson's symptoms to become much worse. Tell your doctor if your condition lasts or gets worse (such as your Parkinson's symptoms are not controlled).The side effects of Entacapone Oral: Nausea, vomiting, diarrhea, unwanted/uncontrolled movements, increased sweating, drows </s>