Tasimelteon

openFDA label record#

This page contains supplementary openFDA label data. For the canonical label presentation, use the corresponding DailyMed Structured Product Label.

Verified complete openFDA source JSON (canonical bytes are SHA-256 checked before publication)

Brand name
Tasimelteon
Generic name
TASIMELTEON
Manufacturer
Teva Pharmaceuticals, Inc.
Product type
HUMAN PRESCRIPTION DRUG
SPL set ID
ce5a2fa3-ed54-422d-96c2-1821496eb32f
SPL ID
84fb7983-5377-442b-b099-d6fbacb0f4ba
Version
6
Effective date
2026-08-18
Source export date
2026-09-28
Source partition
8
Source file
https://download.open.fda.gov/drug/label/drug-label-0008-of-0014.json.zip
Source object key
raw/openfda/drug-label/2026-09-28/ae3816359e336a5de4f44607730a3d12ceb61ffa012a132189ceda22541b38ee/drug-label-0008-of-0014.json.zip
Source manifest SHA-256
cd2e66336a5cd2223fa3995098fdbdb84c6a7ee5c0a4addb236ccb22dd1e6887
Import run
20260929T050834Z
Imported at
2026-09-29 05:56:20
Harmonized routes table
Harmonized routes
ORAL

Warnings cross-check#

openFDA text is shown for search and cross-checking; DailyMed SPL is canonical.

Warnings sections page 1 of 1 · 1 matching rows.

warnings and cautions

5 WARNINGS AND PRECAUTIONS May cause somnolence: After taking tasimelteon capsules, patients should limit their activity to preparing for going to bed, because tasimelteon can impair the performance of activities requiring complete mental alertness ( 5.1 ) 5.1 Somnolence After taking tasimelteon capsules, patients should limit their activity to preparing for going to bed. Tasimelteon can potentially impair the performance of activities requiring complete mental alertness.

Adverse reactions cross-check#

openFDA text is shown for search and cross-checking; DailyMed SPL is canonical.

Adverse reactions sections page 1 of 1 · 2 matching rows.

adverse reactions

6 ADVERSE REACTIONS The most common adverse reactions (incidence >5% and at least twice as high on tasimelteon than on placebo) were headache, increased alanine aminotransferase, nightmares or unusual dreams, and upper respiratory or urinary tract infection ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Teva at 1-888-838-2872 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. More than 2080 subjects have been treated with at least one dose of tasimelteon, of which more than 380 have been treated for > 26 weeks and more than 170 have been treated for > 1 year. Non-24-Hour Sleep-Wake Disorder (Non-24) A 26-week, parallel-arm placebo-controlled study (Study 1) evaluated tasimelteon (n=42) compared to placebo (n=42) in patients with Non-24. A randomized-withdrawal, placebo-controlled study of 8 weeks duration (Study 2) also evaluated tasimelteon (n=10), compared to placebo (n=10), in patients with Non-24. In placebo-controlled studies, 6% of patients exposed to tasimelteon discontinued treatment due to an adverse event, compared with 4% of patients who received placebo. Table 2 shows the incidence of adverse reactions from Study 1. Table 2: Adverse Reactions in Study 1 Tasimelteon N=42 Placebo N=42 Headache 17% 7% Alanine aminotransferase increased 10% 5% Nightmare/abnormal dreams 10% 0% Upper respiratory tract infection 7% 0% Urinary tract infection 7% 2% *Adverse reactions with an incidence >5% and at least twice as high on tasimelteon than on placebo are displayed.

adverse reactions table

<table><caption>Table 2: Adverse Reactions in Study 1</caption><col width="192.25pt"/><col width="96pt"/><col width="96pt"/><tbody><tr><td styleCode=" Botrule Toprule Lrule Rrule"/><td align="center" valign="bottom" styleCode=" Botrule Toprule Lrule Rrule"><paragraph><content styleCode="bold">Tasimelteon</content></paragraph><paragraph><content styleCode="bold">N=42</content></paragraph></td><td align="center" valign="bottom" styleCode=" Botrule Toprule Lrule Rrule"><paragraph><content styleCode="bold">Placebo</content></paragraph><paragraph><content styleCode="bold">N=42</content></paragraph></td></tr><tr><td styleCode=" Botrule Toprule Lrule Rrule"><paragraph>Headache</paragraph></td><td align="center" styleCode=" Botrule Toprule Lrule Rrule"><paragraph>17%</paragraph></td><td align="center" styleCode=" Botrule Toprule Lrule Rrule"><paragraph>7%</paragraph></td></tr><tr><td styleCode=" Botrule Toprule Lrule Rrule"><paragraph>Alanine aminotransferase increased</paragraph></td><td align="center" styleCode=" Botrule Toprule Lrule Rrule"><paragraph>10%</paragraph></td><td align="center" styleCode=" Botrule Toprule Lrule Rrule"><paragraph>5%</paragraph></td></tr><tr><td styleCode=" Botrule Toprule Lrule Rrule"><paragraph>Nightmare/abnormal dreams</paragraph></td><td align="center" styleCode=" Botrule Toprule Lrule Rrule"><paragraph>10%</paragraph></td><td align="center" styleCode=" Botrule Toprule Lrule Rrule"><paragraph>0%</paragraph></td></tr><tr><td styleCode=" Botrule Toprule Lrule Rrule"><paragraph>Upper respiratory tract infection</paragraph></td><td align="center" styleCode=" Botrule Toprule Lrule Rrule"><paragraph>7%</paragraph></td><td align="center" styleCode=" Botrule Toprule Lrule Rrule"><paragraph>0%</paragraph></td></tr><tr><td styleCode=" Botrule Toprule Lrule Rrule"><paragraph>Urinary tract infection</paragraph></td><td align="center" styleCode=" Botrule Toprule Lrule Rrule"><paragraph>7%</paragraph></td><td align="center" styleCode=" Botrule Toprule Lrule Rrule"><paragraph>2%</paragraph></td></tr><tr><td colspan="3"><paragraph>*Adverse reactions with an incidence &gt;5% and at least twice as high on tasimelteon than on placebo are displayed.</paragraph></td></tr></tbody></table>

Reported adverse events (FAERS/openFDA)#

Adverse event summaries are temporarily unavailable. Other product information remains available.