CClinicalTrials.gg
RecruitingNCT05361707Updated Mar 21, 2024

Evaluating the Effects of Tasimelteon in Individuals With Autism Spectrum Disorder (ASD) and Sleep Disturbances

A Phase 3 interventional study of Tasimelteon Oral Capsule, Tasimelteon Liquid Suspension in Autism Spectrum Disorder, Sleep Disorder and Neurological Disorder, sponsored by Vanda Pharmaceuticals. Recruiting at 5 sites in United States. Open to participants aged 2 Years to 65 Years. Per ClinicalTrials.gov, last updated 2024-03-21.

Sponsored by Vanda Pharmaceuticals · Phase 3, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Jul 2025, 1 year 3 months ago, but the record still lists the study as recruiting.
  • Started Jul 2021; still recruiting 5 years 2 months later.
Phase
Phase 3
Study type
Interventional
Enrollment
100
Allocation
Not applicable
Ages
2 Years to 65 Years
Sex
All
01

Study summary

This is a multicenter, open-label study to evaluate the efficacy and safety of a daily single oral dose of tasimelteon in treating sleep disturbances in pediatric and adult participants with ASD.

02

Conditions studied

  • Autism Spectrum Disorder
  • Sleep Disorder
  • Neurological Disorder
  • Sleep Disturbance
03

In context

Sleep Wake Disorders

788 studies on the registry are indexed under Sleep Wake Disorders; 186 are open to participants now.

This study's planned enrollment of 100 is above the median of 62 across 548 interventional studies indexed under Sleep Wake Disorders.

Browse Sleep Wake Disorders studies →

Lead sponsor

Vanda Pharmaceuticals is the lead sponsor of 81 studies on the registry; 18 are open to participants now.

Of its 31 completed or terminated interventional studies of FDA-regulated products, 22 (71%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
2 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Ability and acceptance to provide written informed consent of the participant or legal guardian (and assent as required).
  • A confirmed clinical diagnosis of Autism Spectrum Disorder (ASD) and a recent history of sleep disturbances.
  • The sleep disturbance must not be a result of another diagnosable disorder or medication.
  • Male or female between 2 and 65 years of age, inclusive.
  • Willing and able to comply with study requirements and restrictions.

Exclusion criteria

Exclusion Criteria:

  • Inability to dose daily with tasimelteon or previous intolerance to tasimelteon.
  • Indication of impaired liver function.
  • Evidence of increased risk of self-harm.
  • Pregnant or lactating females.
  • A positive test for drugs of abuse.
  • Other diagnosable causes of sleep disorders or use of medications that may cause sedation or stimulation.
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
100 participants (estimated)

Study arms

  • Experimental
    Tasimelteon

    Drug: Tasimelteon

    Drug: Tasimelteon Oral Capsule, Tasimelteon Liquid Suspension

Interventions

  • DrugTasimelteon Oral Capsule, Tasimelteon Liquid Suspension

    Once Daily

06

What researchers measure

Primary outcomes

  1. Change in sleep time over the treatment period, as measured by sleep diary.

    Time frame: 12 weeks

Secondary outcomes

  1. Improvement in objective sleep-wake parameters such as severity of condition, as measured by administered questionnaires.

    Time frame: 12 weeks

  2. Improvement in objective behavioral parameters such as the participant's overall behavior, as measured by sleep diary in the Patient Global Impression of Severity Behavior Questionnaire (PGI-S Behavior).

    Time frame: 12 weeks

  3. Assessment of safety and tolerability of daily single dose of tasimelteon, as measured by spontaneous reporting of adverse events (AEs).

    Time frame: 12 weeks

07

Study locations

5 of 5 sites recruiting
  • Vanda Investigational Site
    San Jose, California 95124, United States
    • Vanda Pharmaceuticals · Contact · 202-734-3400
    Recruiting
  • Vanda Investigational Site
    San Leandro, California 94578, United States
    • Vanda Pharmaceuticals · Contact · 202-734-3400
    Recruiting
  • Vanda Investigational Site
    Santa Monica, California 90404, United States
    • Vanda Pharmaceuticals · Contact · 202-734-3400
    Recruiting
  • Vanda Investigational Site
    Boulder, Colorado 80301, United States
    • Vanda Pharmaceuticals · Contact · 202-734-3400
    Recruiting
  • Vanda Investigational Site
    Staten Island, New York 10312, United States
    • Vanda Pharmaceuticals · Contact · 202-734-3400
    Recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 21, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05361707
Lead sponsor
Vanda Pharmaceuticals
Responsible party
Sponsor
First posted
May 5, 2022
Start date
Jul 28, 2021
Primary completion
Jul 2025 (estimated)
Completion
Jul 2025 (estimated)
Last update
Mar 21, 2024

Study contacts

Vanda Pharmaceuticals Inc.
Contact
VEC162@vandapharma.com
202-734-3400

Oversight

FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Interested in this study?

Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.

Contact study team

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion