The following side effects have been reported by people with Parkinson's disease treated with<unk> : * Abdominal pain * Nausea * Vomiting * Fatigue * Dry mouth * Back ache Movement problems The most common side effect of<unk>  is movement problems, which occur in 25% of people taking<unk> . This drug may cause or worsen dyskinesia for people with Parkinson's disease treated together with levodopa and carbidopa. In particular, "peak-dose dyskinesias" may occur when levodopa levels are at its peak concentration in the serum plasma. Diarrhea 10% of patients taking<unk>  have been shown to experience diarrhea. Diarrhea may occur within 4–12 weeks of initial<unk>  use but resolves after discontinuation of the drug. Use of<unk>  in the presence of diarrhea can also be associated with weight loss, low potassium levels, and dehydration. In clinical studies, severe diarrhea was the most common reason for discontinuation of<unk> . Urine color 10% of people taking<unk>  experience a change in urine color to orange, red, brown, or black. This side effect is due to<unk>  metabolism and excretion in the urine and shown to not be harmful. Sudden sleep onset People have reported sudden sleep onset while engaging in daily activities without prior warning of drowsiness. In controlled studies, patients on<unk>  had a 2% increased risk of somnolence compared to placebo. Low blood pressure Episodes of orthostatic hypotension have been shown to be more common at the start of<unk>  use due to increased levels of levodopa. Behavior problems Post-marketing data shows that<unk>  may change or worsen mental status, leading to behaviors such as delusions, agitation, confusion, and delirium. People taking<unk>  may experience increased urges to participate in gambling, sexual activities, money spending, and other stimulating reward behaviors.
Entacapone
Rivastigmine
Influenzanet
Nabilone
Tasimelteon
Droxidopa
Ixabepilone
Zaleplon