Key takeaways
Entacapone (Comtan) and Rytary (carbidopa/levodopa) are both used to treat symptoms of Parkinson's disease (PD), but they work differently and have distinct uses. Entacapone is a COMT inhibitor that must be taken with carbidopa/levodopa to help levodopa stay in your body longer, enhancing its effectiveness. It is available in both brand-name and generic forms. On the other hand, Rytary is a combination of carbidopa and levodopa in an extended-release capsule, taken three times a day to directly replace dopamine in your brain. Rytary is not available in a generic version, which can make it more expensive. While both medications can cause side effects like nausea and involuntary movements, Rytary can also cause unusual dreams and headache. Additionally, Rytary can be taken with or without food, but high-fat meals should be avoided, whereas entacapone can be taken with or without food without such restrictions.
