Overview Effects of H1-Antagonist on Cognition Status: Completed Trial end date: 2007-05-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine whether histamine is involved in memory and specific processes in human cognition. Phase: N/A Details Lead Sponsor: Maastricht University Medical CenterTreatments: ChlorpheniramineDexchlorpheniramineLorazepam