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FT218

Phase 3

Excessive Daytime Sleepiness | Small molecule | Neurology |Avadel Pharmaceuticals plc|Last Updated: May 11, 2026

Success Probability

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment212

FDA Designations

No designations recorded

Clinical trial landscape

FT218 · 3 trials · 8 indications

Phase 3 3
NCT06525077Safety and Efficacy of FT218 in Idiopathic Hypersomnia (REVITALYZ)Idiopathic Hypersomnia
COMPLETED157 Analytics
NCT04451668An Open Label Study of FT218 in Subjects With NarcolepsyNarcolepsy
COMPLETED184 Analytics
NCT02720744Once-Nightly Sodium Oxybate for Treatment of Excessive Daytime Sleepiness and Cataplexy in NarcolepsyExcessive Daytime Sleepiness
COMPLETED212 Analytics
PHASE3COMPLETED
Safety and Efficacy of FT218 in Idiopathic Hypersomnia (REVITALYZ)
Idiopathic HypersomniaUnlock trial analytics
PHASE3COMPLETED
An Open Label Study of FT218 in Subjects With Narcolepsy
NarcolepsyUnlock trial analytics
PHASE3COMPLETED
Once-Nightly Sodium Oxybate for Treatment of Excessive Daytime Sleepiness and Cataplexy in Narcolepsy
Excessive Daytime SleepinessUnlock trial analytics

Study Endpoints

Primary Endpoints

Epworth Sleepiness Scale (ESS)
End of stable dose visit to end of double-blind, randomized withdrawal visit [Week 12 to Week 14; 2 week period]

Change in total ESS score

Incidence of treatment-related adverse events
24 months

Assess the long-term safety and tolerability of FT218 by the number of participants experiencing treatment-related adverse events

Incidence of clinically significant changes in vital signs
24 months

Assess the long-term safety and tolerability of FT218 by the number of participants experiencing clinically significant changes in vital signs

Incidence of clinically significant changes in laboratory test results
24 months

Assess the long-term safety and tolerability of FT218 by the number of participants experiencing clinically significant changes in laboratory test results

Maintenance of Wakefulness Test (MWT)
Study Visit 8 at 14 weeks

Change from Baseline for MWT, which is the mean latency across 5 naps, averaged over the test day

Proportion of Patients That Were Very Much Improved or Much Improved on Clinical Global Impression of Improvement as Compared to Screening
Study Visit 8 at 14 weeks

The CGI is the clinician's global impression of improvement in daytime sleepiness. For the CGI, a GLIMMIX (generalized linear mixed models) model for binomial data with logit link was used to analyze the categorized CGI response, i.e., the proportions of subjects who were Very Much Improved or Much Improved as compared to Screening

Number of Cataplexy Attacks at Visit 8 (Week 14) as Compared to Baseline
Visit 8 - Change from Baseline at 14 Weeks

Mean number of cataplexy events recorded on the Sleep and Symptom Daily Diary during the period

Secondary Endpoints

Patient Global Impression of change (PGI-C)
End of stable dose visit to end of double-blind, randomized withdrawal visit [Week 12 to Week 14; 2 week period]
Idiopathic Hypersomnia Severity Scale (IHSS)
End of stable dose visit to end of double-blind, randomized withdrawal visit [Week 12 to Week 14; 2 week period]
Clinical Global Impression of change (CGI-C)
End of stable dose visit to end of double-blind, randomized withdrawal visit [Week 12 to Week 14; 2 week period]
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
FT218EXPERIMENTALFT218 at stable dose (selected during earlier titration) administered orally once nightly
PlaceboPLACEBO_COMPARATORPlacebo equivalent administered orally once nightly
Sodium OxybateEXPERIMENTALPatients will undergo a screening period and will then be titrated to the following once-nightly doses: 4.5 g sodium oxybate, 6.0 g sodium oxybate, 7.5 g sodium oxybate, and 9.0 g sodium oxybate.

Interventions

NameTypeDescription
FT218DRUGSodium oxybate for extended-release oral suspension
PlaceboOTHERMatched placebo equivalent for oral suspension
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites7

Inclusion Criteria: * Primary diagnosis of idiopathic hypersomnia * Total ESS score at Screening \> 11 if not on prior oxybate * Average nightly total sleep time of \> 7 hours * May use stimulants/alerting agents but dose and regimen must have been stable for 2 months prior to Screening, and remain...

Countries:United StatesCanadaAustraliaCzechiaFranceGermany
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Recent Changes (Last 90 Days)

MEDIUMJun 11, 2026NCT06525077TRIAL_REMOVED: changed
MEDIUMJun 11, 2026NCT06525077TRIAL_REMOVED: changed
MEDIUMJun 11, 2026NCT06525077TRIAL_REMOVED: changed

Frequently asked questions about FT218

What is FT218 used for?

FT218 is an investigational small molecule being developed for the treatment of excessive daytime sleepiness, idiopathic hypersomnia, and narcolepsy. It is a once-nightly formulation of sodium oxybate. FT218 is currently in Phase 3 clinical development and has not been approved by the FDA.

Who makes FT218?

FT218 is being developed by Avadel Pharmaceuticals plc, a biopharmaceutical company traded on the NASDAQ under the ticker symbol AVDL. The company is conducting Phase 3 clinical trials to evaluate the safety and efficacy of FT218 for the treatment of narcolepsy and idiopathic hypersomnia.

What phase is FT218 in?

FT218 is in Phase 3 clinical development. It has completed three Phase 3 trials, including studies in narcolepsy and idiopathic hypersomnia. FT218 is an investigational drug and has not received FDA approval. Its safety and efficacy have not been fully established.

What clinical trials is FT218 in?

FT218 has completed three Phase 3 clinical trials: NCT02720744, a placebo-controlled study in narcolepsy with 212 participants; NCT04451668, an open-label study in narcolepsy with 184 participants; and NCT06525077, a study in idiopathic hypersomnia with 157 participants. All trials are completed.

Is FT218 the same as sodium oxybate?

FT218 is a once-nightly formulation of sodium oxybate, the active ingredient. It is designed to be taken once at bedtime, whereas other sodium oxybate products may require multiple doses. FT218 is being studied for the treatment of narcolepsy and idiopathic hypersomnia.