9 results
to assess whether a single-dose of levodopa improves cognitive symptoms and balances goal-directed and habitual behavior.
To replicate and extend the findings of the recent methylphenidate study in which methylphenidate was found to enhance episodic memory performance; To explore whether this effect of methylphenidate is primarily mediated by its dopaminergic action.
To examine the effect of L-dopa addition to optimal D2-blocking antipsychotic treatment on positive symptoms, negative symptoms, cognitive symptoms and extrapyramidal symptoms in schizophrenia.
Primary objectiveThe primary objective of this trial is to identify the optimal effective dose of AS900672-Enriched to induce ovulation in oligo-anovulatory infertile women.Secondary objectives* To demonstrate that the clinical pregnancy rate of the…
To investigate the effects of galantamine on cognitive impairment and visual hallucinations in Parkinson`s disease, both therapeutic (direct effect) and preventive (protection against an acute increase of dopaminergic medication used by the patient…
Primary Objectives:- To investigate the effects of a single dose (plasma concentration) 5-HTP challenge test (5-HTP200mg/CBD100+50mg/granisetron2mg) on hypothalamic fMRS activation patterns in healthy male volunteers.Secondary Objectives:- To assess…
Primary:1. To establish the effect of MCP on the release of plasma AVP and subsequent ACTH and cortisol secretion in the absence of a 5HTP-challenge.2. To establish the effect of MCP on the release of plasma AVP and subsequent ACTH and cortisol…
The primary objective is to compare a 12-month antithrombotic regimen of edoxaban in combination with clopidogrel or another P2Y12 antagonist against a regimen of a vitamin K antagonist (VKA) in combination with clopidogrel or another P2Y12…
This is a medical-scientific research study. The purpose of the study is to investigate the effect of multiple doses of the study compound BIA 28-6156 on the pharmacokinetics of the drugs levodopa-carbidopa (Group 1) and levodopa-benserazide (Group…