A Study of Oral BTD-001 in Adults With Idiopathic Hypersomnia

This is a randomized, placebo-controlled, double-blind, crossover study of oral BTD-001 in
adults with Idiopathic Hypersomnia (IH). The objectives of this study are two-fold: 1) To
evaluate the efficacy of BTD-001 in subjects with IH as reflected by changes in cognitive,
sleep, functional, and quality-of-life measures and 2) To characterize the safety and
tolerability of oral BTD-001 administered to subjects with IH.

Inclusion Criteria:

- Males or Females age 18 to 70 years old

- Onset of hypersomnia between age 10 and 30 years of age

- An Epworth Sleepiness Scale score of greater than or equal to 11

- Able to comply with requirements for concomitant medications and consumption of
caffeine, alcohol, tobacco and nicotine (if on stimulants, agree to adhere to stable
regimen throughout the trial)

- Females with a negative pregnancy test AND who are non-lactating

- Sexually active females of childbearing potential must be willing to use a highly
effective method of birth control

- Sexually active males must have a vasectomy or use condoms

Exclusion Criteria:

- History of any disorder causing hypersomnia other than IH

- Evidence of circadian-rhythm disorder

- Sleep apnea syndrome

- Use of CPAP

- Obese subjects with BMI greater than or equal to 35kg/m2

- History of or current seizure disorder or history of syncope, unexplained loss of
consciousnesses or seizure in the past 3 years as well as any past history of
benzodiazepine and/or barbiturate and/or alcohol-related withdrawal seizures

- Columbia-Suicide Severity Rating Scale (C-SSRS) findings consistent with significant
history of or current suicidal ideation or behavior

- Subjects who fail to wash out medications for IH or any other prohibited medications

- Positive toxicology screen test during the Screening or Baseline Visits.

- Clinically significant abnormal findings from physical, electrocardiogram (ECG) or
laboratory assessments at Screening

- History of or current significant pulmonary, cardiac, neurological or psychiatric
disease, substance dependence, porphyria, malignancy (with exception of local
cutaneous squamous or basal cell carinomas or local cervical squamous cell carcinoma
resolved after resection) or hypothyroidism (unless euthyroid at Screening Visit and
treated with a stable dose of medication for at least 3 months prior to the Baseline
Visit).

- Participation in a clinical drug trial within 4 weeks of Screening Visit