Trofinetide
Trofinetide is a synthetic peptide-related medicine used for Rett syndrome. The US products DAYBUE and DAYBUE STIX share the active ingredient but differ in formulation.
At a glance
- Evidence stage
- Approved use
- Regulatory status
- US-approved DAYBUE and DAYBUE STIX treat Rett syndrome in adults and children aged 2 years and older.
- Research context
- Trofinetide is a synthetic peptide-related medicine used for Rett syndrome. The US products DAYBUE and DAYBUE STIX share the active ingredient but differ in formulation.
What this is
- Trofinetide is a synthetic peptide-related medicine used for Rett syndrome. The US products DAYBUE and DAYBUE STIX share the active ingredient but differ in formulation.
What this isn't
- A recommendation to use, prepare, combine, or administer a product
- Evidence that a related molecule or a differently formulated product has the same effects
Key terms
Trofinetide is a synthetic peptide-related medicine used for Rett syndrome. The US products DAYBUE and DAYBUE STIX share the active ingredient but differ in formulation.
Trofinetide is related to a short fragment of insulin-like growth factor 1, but that relationship does not establish how it improves Rett symptoms. The prescribing information explicitly states that its therapeutic mechanism is unknown. Claims that it repairs neurons or corrects the underlying MECP2 mutation go beyond the established clinical mechanism. Product label.
Evidence limits
How to read the evidence
The controlled trial was short and did not directly include children aged 2–4; broader labeling incorporates additional evidence. DAYBUE STIX relies in part on comparable drug exposure to the solution. These findings concern Rett syndrome and do not establish benefits for general cognition, autism, or healthy aging. Product-specific scope.
Sources appraised 2026-10-28. Educational information; not medical advice. Study findings apply to the populations, preparations and outcomes described.
External sources and citations
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