Entacapone Home>Pharmacy>Drugs_and_Medications>E>Entacapone     Web Pages Comtan Full prescribing information from RxList. Comtan® (entacapone) - Novartis Official pharmaceutical site for this drug used in the treatment of Parkinson’s Disease as an adjunct to levodopa/carbidopa therapy. Food and Drug Administration (FDA) - Comtan Consumer Information Patient FAQ in html format with a link to approved labeling (as pdf).