TheraRadar
Data updated: May 26, 2026

TASIMELTEON

Melatonin Receptor Agonists
Sleep Approved 2022-12-12

TASIMELTEON is indicated for the treatment of Non-24-Hour Sleep-Wake Disorder.

Source: FDA Label • Apotex • Melatonin Receptor Agonist

How TASIMELTEON Works

The precise mechanism by which tasimelteon exerts its therapeutic effect in patients with Non-24 is unclear. Tasimelteon functions as an agonist at melatonin MT1 and MT2 receptors; these receptors are believed to be involved in the regulation of circadian rhythms.

Source: FDA Label
3
Indications
--
Phase 3 Trials
3
Years on Market

Details

Status
Prescription
First Approved
2022-12-12
Routes
ORAL
Dosage Forms
CAPSULE

Companies

Active Ingredient: TASIMELTEON

TASIMELTEON Approval History

2023
2024
2025
2026
Original
New Indication
New Form
Label Update
3 FDA actions from 2022 to 2023
Jan 2023 ORIGINAL
Update
Dec 2022 ORIGINAL
Update
Dec 2022 ORIGINAL
Update

What TASIMELTEON Treats

1 indications

TASIMELTEON is approved for 1 conditions since its original approval in 2022. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Non-24-Hour Sleep-Wake Disorder
Source: FDA Label

TASIMELTEON Competitive Set

Pro

Three rings of competition based on shared molecular targets and treated indications.

MoA expansion candidates

2

Same target(s), different indications — where else is this mechanism being explored?

Filters applied: drops same-active-ingredient (505(b)(2) reformulations), route-mismatch (topical vs systemic), and cross-therapeutic-area matches in same-indication rings.

Drugs Similar to TASIMELTEON

FDA-approved drugs for similar conditions. Compare mechanisms and indications to understand treatment alternatives.

HETLIOZ
TASIMELTEON
1 shared
VANDA PHARMS INC
Shared indications:
Non-24-Hour Sleep-Wake Disorder
HETLIOZ LQ
TASIMELTEON
1 shared
VANDA PHARMS INC
Shared indications:
Non-24-Hour Sleep-Wake Disorder
📋

Clinical Trial Registry

18 trials
Trial Sponsor ID Phase Status Title
NCT04652882 VP-VEC-162-3502 Ph 3 recruiting Evaluating the Effects of Tasimelteon vs. Placebo in Delayed Sleep-Wake Phase Disorder (DSWPD)
NCT06701396 VP-VEC-162-3501 Ph 3 recruiting Evaluating the Effects of Tasimelteon Vs. Placebo in Delayed Sleep-Wake Phase Disorder (DSWPD) and the CRY1Δ11 Variant
NCT06323655 VP-VEC-162-1201 Ph 1 completed Evaluation of Next-Day Residual Effects of Tasimelteon Compared With Placebo and Active Control in Healthy Subjects
NCT02776215 VP-VEC-162-4201 Ph 1 completed Study of the Pharmacokinetics and Safety of Tasimelteon in Children and Adolescents
NCT03373201 results posted VP-VEC-162-3107 Ph 3 completed Evaluating the Effects of Tasimelteon vs. Placebo on Jet Lag Type Insomnia
NCT02231008 VP-VEC-162-2401 Ph 2, Ph 3 completed Evaluating the Effects of Tasimelteon vs Placebo on Sleep Disturbances in SMS
NCT03291041 results posted VP-VEC-162-2102 Ph 2 completed A Proof of Concept Study to Evaluate the Effects of Tasimelteon and Placebo in Travelers With Jet Lag Disorder
NCT01428661 MAGELLAN results posted VP-VEC-162-2301 Ph 2, Ph 3 completed Melatonin Agonist Effects of Tasimelteon Versus Placebo in Patients With Major Depressive Disorder
NCT01429116 VP-VEC-162-3204 Ph 3 completed Tasimelteon for the Treatment of Non-24-hour Sleep-Wake Disorder (N24HSWD) in Blind Individuals With no Light Perception
NCT01163032 results posted VP-VEC-162-3201 Ph 3 completed Efficacy and Safety of Tasimelteon Compared With Placebo in Totally Blind Subjects With Non-24-Hour Sleep-Wake Disorder
NCT01430754 results posted VP-VEC-162-3203 Ph 3 completed Withdrawal Study to Demonstrate the Maintenance Effect in the Treatment of Non-24-Hour Sleep-Wake Disorder
NCT01271387 VP-VEC-162-1105 Ph 1 completed Pharmacokinetics of Tasimelteon in Subjects With Mild or Moderate Hepatic Impairment
NCT01402076 VP-VEC-162-1110 Ph 1 completed A Study to Assess the Effect Tasimelteon on the Cytochrome P450 3A4 and 2C8 Enzymes in Healthy Subjects
NCT01526746 VP-VEC-162-1106 Ph 1 completed Pharmacokinetics of Tasimelteon in Subjects With Renal Impairment and Matched Control Subjects With Relatively Normal Renal Function
NCT01540500 VP-VEC-162-1111 Ph 1 completed Pharmacokinetics of Tasimelteon Alone and in Combination With CYP1A2 Inhibitor, Fluvoxamine
NCT01637636 VP-VEC-162-1112 Ph 1 completed Pharmacokinetics of Tasimelteon Alone and in Combination With a CYP3A4 Inhibitor, Ketoconazole, or a CYP3A4 Inducer, Rifampin.
NCT01578057 VP-VEC-162-1108 Ph 1 completed Evaluation of the Pharmacodynamic and Pharmacokinetic Interactions of Tasimelteon and Ethanol
NCT01477619 VP-VEC-162-1107 Ph 1 completed Effects of Smoking, Age and Body Size on Pharmacokinetics, Safety and Tolerability on Tasimelteon in Healthy Subjects
🔬

Active Pipeline

Pro

Ongoing clinical trials by development phase

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Key Completed Trials

Pro

Completed studies with published results, ranked by significance

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Trial Timeline

Full development history with FDA approval milestones

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

TASIMELTEON FDA Label Details

Indications & Usage

TASIMELTEON is indicated for the treatment of Non-24-Hour Sleep-Wake Disorder.

Looking for the branded version?

HETLIOZ LQ

Full clinical data, patents, trials, and competitive landscape for tasimelteon.

See HETLIOZ LQ

Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.