Medicine Name: Entacom Tablet. Composition: Entacapone (200mg). Side Effects: Nausea Vomiting Fatigue Confusion Constipation Insomnia difficulty in sleeping Nightmares Hallucination Increased sweating Fall Urine discoloration Dizziness Diarrhea Muscle coordination impaired Ischemic heart disease Heart attack Abdominal pain Dryness in mouth.