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A Phase I Partially Blinded Study to Evaluate the Safety, Tolerability, Pharmacodynamics, and Pharmacokinetics of Rivastigmine with Glycopyrrolate or Trospium in Healthy Elderly Volunteers

Primary:To establish the safety and tolerability of rivastigmine when given with concomitant glycopyrrolate at an accelerated dose escalation schedule up to 12 mg BID.To establish the safety and tolerability of rivastigmine when given with…

A study of the effects of single doses of MK-1167 on neurotransmitter cycling in the brain of healthy adult participants using 13C-Magnetic Resonance Spectroscopy.

To investigate effect of a single dose of MK-1167 on glutamate levels in the brain using MRS. Glutamate is a chemical that sends signals between nerve cells in the brain. To test the safety and tolerability of single oral doses of the trial drug, MK…

A Study to Evaluate the Safety, Tolerability and Pharmacokinetics of Single and Multiple Doses of Donepezil with Glycopyrrolate or Trospium in Elderly Volunteers

Primary objectivesPart 1To evaluate the single dose safety and tolerability of donepezil 10 mg when administered with placebo, glycopyrrolate or trospiumPart 2To evaluate the safety and tolerability of donepezil when given with concomitant placebo,…