 <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] opa J-Tube: This medication is used to treat symptoms of Parkinson's disease (such as shakiness, stiffness, difficulty moving).Parkinson's disease is thought to be caused by too little of a naturally occurring substance (dopamine) in the brain. Levodopa changes into dopamine in the brain, helping to control movement. Carbidopa prevents the breakdown of levodopa in the bloodstream so more levodopa can enter the brain. Carbidopa can also reduce some of levodopa's side effects such as nausea and vomiting.By giving this medication as a continuous infusion, it can help reduce the amount of "off" time (periods of slow movement or stiffness). How to use Duopa Intestinal Pump Suspension Read the Medication Guide and the Instructions for Use provided by your health care professional before you start using this medication and each time you get a refill. If you have any questions, ask your health care professional. Give this medication as directed as a continuous infusion into the small intestine using an infusion pump. It is usually given over 16 hours a day and stopped at bedtime. At bedtime, take your dose of immediate-release carbidopa/levodopa tablets by mouth as directed. When you first start using this </s>