Study Design: Study Type : Interventional (Clinical Trial) Estimated Enrollment : 20 participants Allocation: Randomized Intervention Model: Crossover Assignment Masking: Triple (Participant, Investigator, Outcomes Assessor) Primary Purpose: Treatment Official Title: A Multi-center, Randomized, Double-blind, Placebo-controlled, 3-Week Crossover Study to Assess the Efficacy and Safety of AXS-12 in Subjects With Cataplexy and Excessive Daytime Sleepiness in Narcolepsy Actual Study Start Date : January 30, 2019 Estimated Primary Completion Date : June 2019 Estimated Study Completion Date : June 2019
Outcome Measurement 1) Primary Outcome Measures : Number of cataplexy attacks [ Time Frame: Change from Baseline to end of Week 2 (Period 1) and Week 5 (Period 2) ]
Secondary Outcome Measures : 1) Epworth Sleepiness Scale (ESS) [ Time Frame: Change from Baseline to end of Week 2 (Period 1) and Week 5 (Period 2) ] The ESS is a patient-reported questionnaire consisting 8 questions. Each of the items are rated on a 4-point scale (0-3), based on the usual chances of dozing off or falling asleep while engaged in eight different activities. The total ESS score can range from 0 to 24.
2) Maintenance of Wakefulness Test (MWT) [ Time Frame: Change from Baseline to end of Week 2 (Period 1) and Week 5 (Period 2) ]