Drugs / Trofinetide

Regulatory milestones approvals, filings & regulatory actions · 6 recorded

MilestoneJurisdictionBrandIndicationDateSentence it was read from
Filed Rett syndrome 3 milestones
Filed EU (EMA) — Rett syndrome 2025-01-14

“submitted a Marketing Authorization Application (MAA) to the European Medicines Agency (EMA) for trofinetide for the treatment of Rett syndrome” acadia.com ↗

Filed Other — Rett syndrome 2024-04-22

“Health Canada has accepted for review the New Drug Submission (NDS) of trofinetide for the treatment of Rett syndrome” neurenpharma.com ↗

“Health Canada has accepted its New Drug Submission (NDS) for trofinetide for the treatment of Rett syndrome” acadia.com ↗

Filed US (FDA) — Rett syndrome 2022-07-18

“New Drug Application (NDA) for trofinetide to treat Rett syndrome accepted by the US Food and Drug Administration (FDA)” neurenpharma.com ↗

“Acadia Pharmaceuticals Submits New Drug Application to the U.S. FDA for Trofinetide for the Treatment of Rett Syndrome” neurenpharma.com ↗

Approved Indication not stated 2 milestones
Label expansions (2) US (FDA) DAYBUE — 2024-09-30 – 2026-03-27 fda.gov ↗
Approved US (FDA) DAYBUE — 2023-03-10 fda.gov ↗

Trials 12

PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 12 trials
Phase 1 NCT01420042 Feb → Aug 2012 traumatic brain injury Neuren Pharmaceuticals Limited Completed No outcome recorded
Phase 1 NCT00961779 Mar → Aug 2010 traumatic brain injury Neuren Pharmaceuticals Limited Completed No outcome recorded
Phase 26 trials · 2 met primary
Phase 2 NCT02715115 Mar 2016 → Jan 2017 Rett syndrome Neuren Pharmaceuticals Limited Completed Met primary
Phase 2 NCT02100150 Sep 2014 → Jun 2016 traumatic encephalopathy Neuren Pharmaceuticals Limited Terminated No outcome recorded
Phase 2 NCT01894958 Jan 2014 → Sep 2015 fragile X syndrome Neuren Pharmaceuticals Limited Completed Met primary
Phase 2 NCT01703533 Mar 2013 → Sep 2014 Rett syndrome Neuren Pharmaceuticals Limited Completed No outcome recorded
Phase 2 NCT01366820 Feb 2013 → Jan 2016 brain injury Neuren Pharmaceuticals Limited Completed No outcome recorded
Phase 2 NCT00805818 Apr 2010 → Jan 2016 traumatic brain injury Neuren Pharmaceuticals Limited Completed No outcome recorded
Phase 2/31 trial
Phase 2/3 NCT04988867 Sep 2021 → May 2023 Rett syndrome ACADIA Pharmaceuticals Inc. Terminated No outcome recorded
Phase 33 trials · 1 met primary
Phase 3 NCT04776746 Nov 2020 → Jun 2023 Rett syndrome ACADIA Pharmaceuticals Inc. Terminated No outcome recorded
Phase 3 NCT04279314 Jan 2020 → Aug 2022 Rett syndrome ACADIA Pharmaceuticals Inc. Completed No outcome recorded
Phase 3 NCT04181723 Nov 2019 → Oct 2021 Rett syndrome ACADIA Pharmaceuticals Inc. Completed Met primary

News releases announcing trial results or a regulatory action · 57

DateIssuerRelease
2026-08-24 Neuren Pharmaceuticals Limited Regulatory European Commission grants marketing authorisation for DAYBU neurenpharma.com ↗
With this approval, DAYBU is authorized to be marketed in all 27 EU member states, as well as Iceland, Liechtenstein, and Norway.
2026-08-24 ACADIA Pharmaceuticals Inc. Regulatory European Commission Approves DAYBU® (trofinetide) as the First and Only Treatment for Neurobehavioral Symptoms of Rett Syndrome in the European Union acadia.com ↗
Today's approval in the European Union is an important milestone that recognizes the significant unmet medical need in this rare disease.
2026-06-28 Neuren Pharmaceuticals Limited Regulatory DAYBU recommended for approval in the European Union neurenpharma.com ↗
2026-06-26 ACADIA Pharmaceuticals Inc. Regulatory DAYBU® (trofinetide) Recommended for Approval in the European Union by CHMP acadia.com ↗
The CHMP’s positive opinion for DAYBU® is an important milestone in our mission to bring this innovative therapy to the EU, where there are no therapies specifically approved for the neurobehavioral symptoms of this devastating condition,
2026-03-02 Neuren Pharmaceuticals Limited Regulatory Acadia confirms plan to request CHMP re-examination neurenpharma.com ↗
2026-03-02 ACADIA Pharmaceuticals Inc. Regulatory Acadia Pharmaceuticals Announces Plan to Request Re-Examination Following Negative CHMP Opinion for Trofinetide for the Treatment of Rett Syndrome acadia.com ↗
Acadia has reviewed the CHMP grounds for refusal in detail and intends to request a re-examination of the opinion.
2026-02-02 Neuren Pharmaceuticals Limited Regulatory Acadia provides update on EU regulatory submission neurenpharma.com ↗
Subject to the outcome of the CHMP vote in February, Acadia intends to request a re-examination of the opinion by the CHMP upon its formal adoption.
2026-02-02 ACADIA Pharmaceuticals Inc. Regulatory Acadia Pharmaceuticals Provides Update on Regulatory Submission for Trofinetide for the Treatment of Rett Syndrome in the European Union acadia.com ↗
Company expects to receive a negative opinion following oral explanation feedback and intends to request re‑examination upon review of formal adoption.
2026-01-13 ACADIA Pharmaceuticals Inc. Regulatory Acadia Pharmaceuticals Provides Business and Pipeline Updates at 44th Annual J.P. Morgan Healthcare Conference acadia.com ↗
Ministry of Health in Israel recently approved DAYBUE oral solution for the treatment of Rett syndrome in adults and pediatric patients 2 years of age and older and weighing at least 9 kg, further expanding global access to this treatment.
2025-12-14 Neuren Pharmaceuticals Limited Regulatory FDA approves DAYBUE STIX (trofinetide), powder formulation neurenpharma.com ↗
US FDA approves DAYBUE® STIX (trofinetide) for oral solution, a new powder formulation, for Rett syndrome
2025-12-12 ACADIA Pharmaceuticals Inc. Regulatory Acadia Pharmaceuticals Announces FDA Approval of DAYBUE® STIX (trofinetide) for Oral Solution, a New Powder Formulation of Trofinetide for the Treatment of Rett Syndrome acadia.com ↗
Acadia Pharmaceuticals Inc. (Nasdaq: ACAD) today announced that the U.S. Food and Drug Administration (FDA) has approved DAYBUE® STIX (trofinetide) for oral solution, a dye- and preservative-free powder formulation of trofinetide for the treatment of Rett syndrome in adult and pediatric patients two years of age and older.
2025-09-12 ACADIA Pharmaceuticals Inc. Results Real World Data from LOTUS Study Evaluating Long-term Efficacy and Tolerability Outcomes of DAYBUE® (trofinetide) in Patients with Rett Syndrome Published in Developmental Medicine and Child Neurology acadia.com ↗
Acadia Pharmaceuticals Inc. (Nasdaq: ACAD) today announced that the journal Developmental Medicine and Child Neurology published interim results from the caregiver-reported observational online, open-label, ongoing LOTUS study evaluating effectiveness and tolerability outcomes in patients with Rett syndrome who are prescribed DAYBUE® (trofinetide) under routine clinical care in the U.S.

All press releases naming this drug 92 releases

DateIssuerRelease

Evidence & citations 12 cited values

Every value below carries the sentence it was read from. 14 sources stand behind the page.

FieldValueCited text
Known as Trofinetide ClinicalTrials.gov intervention name — accepted as the source's own label NCT04279314 ↗
3

NCT04181723 ↗

NCT04988867 ↗

NCT04776746 ↗

Known as (2S)-2-{[(2S)-1-(2-aminoacetyl)-2-methylpyrrolidine-2-carbonyl]amino}pentanedioic acid “Trofinetide ((2S)-2-{[(2S)-1-(2-aminoacetyl)-2-methylpyrrolidine-2-carbonyl]amino}pentanedioic acid) is derived from the tripeptide glycine-proline-glutamic acid (GPE), which...” PMID 37460385 ↗ Jul 2023
Known as ACP-2566 ChEMBL registry synonym — accepted as the source's own label CHEMBL197084 ↗
Known as Daybue ChEMBL registry synonym — accepted as the source's own label CHEMBL197084 ↗
Known as Experimental name: NNZ-2566 “Experimental name: NNZ-2566” NCT00961779 ↗
Known as Glycyl-L-2-Methylprolyl-L-Glutamic Acid “Glycyl-L-2-Methylprolyl-L-Glutamic Acid (NNZ-2566) supplied as a lyophilized powder (2g in 50mL vials) for reconstitution with lemon flavoured cordial and Water for Injection.” NCT01420042 ↗
1

“Glycyl-L-2-Methylprolyl-L-Glutamic Acid (NNZ-2566) supplied as a lyophilized powder (2g in 50mL vials) for reconstitution with bicarbonate buffer and normal saline.” NCT00961779 ↗

Known as Glycyl-L-2-Methylpropyl-L-Glutamic Acid “Glycyl-L-2-Methylpropyl-L-Glutamic Acid (NNZ-2566) supplied as a lyophilized powder (2g in 50mL vials or 3g in 30mL bottles) for reconstitution with strawberry flavored...” NCT01894958 ↗
2

“Glycyl-L-2-Methylpropyl-L-Glutamic Acid (NNZ-2566) supplied as a lyophilized powder (3g in 30 milliliter vials) for reconstitution with strawberry flavored solution 0.5% v/v in...” NCT02100150 ↗

“Glycyl-L-2-Methylpropyl-L-Glutamic Acid (NNZ-2566) supplied as a lyophilized powder (2g in 50mL vials) for reconstitution with strawberry flavored solution 0.5% v/v in Water...” NCT01703533 ↗

Known as NNZ-2566 ClinicalTrials.gov intervention name — accepted as the source's own label NCT00961779 ↗
7

NCT01703533 ↗

NCT01420042 ↗

NCT02715115 ↗

NCT01894958 ↗

NCT02100150 ↗

NCT01366820 ↗

NCT00805818 ↗

Known as Trofinetida ChEMBL registry synonym — accepted as the source's own label CHEMBL197084 ↗
Modality Peptide “is derived from the tripeptide glycine-proline-glutamic acid (GPE)” PMID 37460385 ↗ Jul 2023
Route Intravenous “Solution for intravenous infusion.” NCT00805818 ↗
Target IGF1R “it acts through the IGF-1 receptor on both neurons and glia” PMID 37460385 ↗ Jul 2023