Multiple Dose Safety and Efficacy Study Evaluating CNS 7056 Versus Midazolam in Patients Undergoing Colonoscopy

This is a double-blind, randomized, parallel group, dose-response study to assess the safety and efficacy of three dose levels of CNS 7056 compared with midazolam to maintain suitable sedation levels in patients undergoing colonoscopy. Safety assessment will include physical examinations, vital signs, ECGs, pulse oximetry measurements, capnography, clinical chemistry and hematology laboratory tests, routine drug and ethanol screening, urinalysis, pregnancy test, pain on injection using a verbal scale, and monitoring of adverse events.