Trofinetide
The first FDA-approved treatment for Rett syndrome, a synthetic analogue of a naturally occurring IGF-1 tripeptide fragment.
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This information is for educational purposes. Peptide therapy should be guided by a licensed healthcare provider. Connect with a Noho clinician
What is Trofinetide?
Trofinetide is a synthetic analogue of glycine-proline-glutamate (GPE), the N-terminal tripeptide of IGF-1 that is naturally cleaved in the brain. It is the first and only FDA-approved treatment for Rett syndrome, a rare genetic neurological disorder. Trofinetide reduces neuroinflammation and supports synaptic function.
Why People Talk About It
First approved treatment for Rett syndrome
StrongNeuroinflammation reduction
ModerateSynaptic function support
EmergingHow It Works
Trofinetide is based on a brain-protective fragment naturally produced from IGF-1. It calms down brain inflammation and supports the connections between neurons, addressing core problems in Rett syndrome.
Common Questions
Safety Information
Common Side Effects
Cautions
- • Monitor for dehydration from GI side effects
- • May require dose adjustment for weight changes
- • Only approved for Rett syndrome
What We Don't Know
Long-term effects beyond the clinical trial duration are being monitored.
Published Research
31 studiesIs trofinetide a future treatment for Rett syndrome? A comprehensive systematic review and meta-analysis of randomized controlled trials
Safety and efficacy of trofinetide in Rett syndrome: a systematic review and meta-analysis of randomized controlled trials
A meta-analysis of the efficacy and safety of trofinetide in patients with rett syndrome
Trofinetide for the treatment of Rett syndrome: Results from the open-label extension LILAC study
Trofinetide Treatment Demonstrates a Benefit Over Placebo for the Ability to Communicate in Rett Syndrome
A Phase 1, Open-Label Study to Evaluate the Effects of Food and Evening Dosing on the Pharmacokinetics of Oral Trofinetide in Healthy Adult Subjects
A Double-Blind, Randomized, Placebo-Controlled Clinical Study of Trofinetide in the Treatment of Fragile X Syndrome
Double-blind, randomized, placebo-controlled study of trofinetide in pediatric Rett syndrome
A Double-Blind, Randomized, Placebo-Controlled Clinical Study of Trofinetide in the Treatment of Rett Syndrome
Population pharmacokinetics of NNZ-2566 in healthy subjects
Results from the phase 2/3 DAFFODIL study of trofinetide in girls aged 2-4 years with Rett syndrome
Exposure-Response Efficacy Modeling to Support Trofinetide Dosing in Individuals with Rett Syndrome
Managing Gastrointestinal Symptoms Resulting from Treatment with Trofinetide for Rett Syndrome: Caregiver and Nurse Perspectives
Physiologically-Based Pharmacokinetic Modeling of Trofinetide in Moderate Renal Impairment for Phase 1 Clinical Study Dose Selection with Model Validation
Characterization of the Pharmacokinetics and Mass Balance of a Single Oral Dose of Trofinetide in Healthy Male Subjects
Design and outcome measures of LAVENDER, a phase 3 study of trofinetide for Rett syndrome
Trofinetide for the treatment of Rett syndrome: a randomized phase 3 study
Assessing Experiences With Trofinetide for Rett Syndrome: Interviews With Caregivers of Participants in Clinical Trials
Trofinetide for the treatment of Rett syndrome: Long-term safety and efficacy results of the 32-month, open-label LILAC-2 study
Profile of Trofinetide in the Treatment of Rett Syndrome: Design, Development and Potential Place in Therapy
Recommendations for the management of gastrointestinal comorbidities with or without trofinetide use in Rett syndrome
Trofinetide: First Approval
Trofinetide for Rett Syndrome: Highlights on the Development and Related Inventions of the First USFDA-Approved Treatment for Rare Pediatric Unmet Medical Need
Real-world benefits and tolerability of trofinetide for the treatment of Rett syndrome: The LOTUS study
A Phase 1, Randomized, Open-Label Study to Assess the Bioequivalence of Trofinetide as a Ready-to-Use Oral Solution and Constituted Powder for Oral Solution in Healthy Adults
Post-marketing safety concerns with trofinetide: a disproportionality analysis of the first therapeutic agent for Rett syndrome based on the FDA adverse event reporting system (FAERS)
Trofinetide Improves Cognitive Function in APP/PS1 Mice by Suppressing Inflammation and Apoptosis
Population Pharmacokinetics of Trofinetide in a Pediatric Population Aged 2-4 Years with Rett Syndrome
Safety Profiles of Trofinetide in Pediatric Rett Syndrome Population: A Real-World Postmarketing Pharmacovigilance Analysis
Trofinetide-Induced Enterocolitis Syndrome in a Child with Rett Syndrome
Population Pharmacokinetic Modeling to Support Trofinetide Dosing for the Treatment of Rett Syndrome
Always consult a qualified clinician
This information is for educational purposes. Peptide therapy should be guided by a licensed healthcare provider. Connect with a Noho clinician
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Quick Facts
- Class
- IGF-1 Tripeptide Analogue
- Evidence
- Strong
- Safety
- Well-Studied
- Updated
- Mar 2026
- Citations
- 31PubMed
Also known as
Tags
Related Goals
Evidence Score
Clinical Trials
View Clinical TrialsLinks to ClinicalTrials.gov for reference. Listing does not imply endorsement.
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