Key takeaways
Tolcapone (Tasmar) and Rytary (carbidopa/levodopa) are both medications used to treat Parkinson's disease (PD). They help manage symptoms like stiffness and slow movement. However, they belong to different medication classes. Tolcapone is a catechol-O-methyltransferase (COMT) inhibitor, while Rytary is a combination of a dopa decarboxylase inhibitor and dopamine replacement. Tolcapone is only used as an add-on treatment with carbidopa/levodopa when symptoms aren't well-controlled, whereas Rytary can be used on its own. Both medications are taken three times daily. Tolcapone can cause serious liver damage, so regular liver monitoring is needed. Rytary can cause sleepiness, nausea, and dizziness and interacts with certain medications like MAOIs and iron.
