The goal of this clinical trial is to see how NLS-2 (mazindol extended-release) works on symptoms of narcolepsy, including cataplexy and excessive daytime sleepiness. Approximately 48 participants will take part in the study across the United States. The study treatment (NLS-2 or placebo) will be administered for 8 weeks. After this treatment period, the participant may have the option to participate in a separate long-term extension study during which all participants will be treated with NLS-2.
This is a Phase 3, double-blind, placebo-controlled, multicenter, randomized, parallel-group clinical trial. The primary goal of this study is to assess the efficacy and safety of NLS-2 (mazindol extended-release) tablets in treating Narcolepsy Type 1. The trial aims to determine the effects of NLS-2 on the improvement of narcolepsy symptoms, including cataplexy frequency and excessive daytime sleepiness. Participants in this trial will receive either NLS-2 or a placebo for 8 weeks. The treatment assignment will be concealed from both the participant and the investigator throughout the trial (unless there is an urgent medical need). Approximately 48 patients will be enrolled at multiple clinical sites across the United States. Following the completion of the trial, participants may be given the option to enroll in a separate long-term extension trial where all participants will receive NLS-2 treatment.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
48
Number of cataplexy episodes at Week 8
Cataplexy episodes is a clinical outcome measure that assesses the frequency of cataplexy episodes.
Time frame: 8 weeks
Patient Reported Outcomes Measurement Information System-Sleep Related Impairment (PROMIS-SRI): change from baseline
The Patient Reported Outcomes Measurement Information System-Sleep Related Impairment (PROMIS-SRI) scale consists of 8 items to evaluate daytime consequences of functioning on a 5-point Likert scale ranging from 1 to 5. The PROMIS-SRI measures self-reported perceptions of alertness, sleepiness, and tiredness during usual waking hours, and perceived functional impairments during wakefulness associated with sleep problems or impaired alertness. Each question has five response options ranging in value from 1 to 5. To find the total raw score with all questions answered, sum the values of the response to each question and total score ranges from 8 to 40. Higher scores indicates greater sleep impairment.
Time frame: 8 weeks
Patient Reported Outcomes Measurement Information System-Sleep Disturbance (PROMIS-SD): change from baseline
The Patient Reported Outcomes Measurement Information System-Sleep Disturbance (PROMIS-SD) consists of a static 8-item questionnaire. Using a recall period of the past 7 days, it assesses the concepts of sleep initiation (2 items), quality of sleep (3 items), early morning feelings (2 items) and worrying about sleep (1 item). Each question has 5 response options ranging in value from 1 to 5. To find the total raw score with all questions answered, sum the values of the response to each question and a total score ranges from 8 to 40. Lower scores indicate less sleep disturbance. Negative changes in scores indicate improvement.
Time frame: 8 weeks
Epworth Sleepiness Scale (ESS): change from baseline
The Epworth Sleepiness Scale (ESS) is a patient-reported outcome measure that assesses daytime sleepiness. It asks the participant to rate, on a 4-point scale (0-3), their usual chances of dozing off or falling asleep in 8 different situations or activities that are commonly met in daily life. The total ESS score, ranging from 0 to 24, is the sum of 8 item scores, with higher scores indicating greater daytime sleepiness.
Time frame: 8 weeks
Patient Global Impression of Severity (PGI-S): change from baseline
The Patient Global Impression of Severity (PGI-S) is a patient-reported outcome measure that assesses the participant's perception of the severity of their illness. The participant rates their condition on a point scale, from "no symptoms" to "extremely severe."
Time frame: 8 weeks
Clinician Global Impression of Severity (CGI-S): change from baseline
The Clinical Global Impressions of Severity (CGI-S) is a clinician-rated outcome measure that assesses the clinician's impression of the participant's current illness severity. The clinician rates the severity of the participant's condition on a point scale, from "normal, not at all ill" to "among the most extremely ill patients".
Time frame: 8 weeks
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