What is the half-life of SS-31 (Elamipretide / MTP-131)?
SS-31 (Elamipretide / MTP-131) has a reported half life of ~2-4 hours, given subcutaneous. That is why it is typically dosed once daily. A shorter half life means more frequent dosing to keep blood levels steady, a longer one lets you space doses further apart.
Quick facts
- Half-life: ~2-4 hours
- Route: Subcutaneous
- Typical schedule: Once daily
- Cycle length: 4-8 weeks
References
- Elamipretide in primary mitochondrial myopathy (MMPOWER trials) — Karaa A et al., Neurology, 2018
- Long-term efficacy and safety of elamipretide in patients with Barth syndrome: 168-week open-label extension results of TAZPOWER — Thompson WR, Manuel R, Abbruscato A, et al. — Genetics in Medicine, 2024
- FORZINITY (elamipretide hydrochloride) injection — FDA Prescribing Information — FDA / DailyMed (Stealth BioTherapeutics), 2025
Pepdex is an editorial reference, not medical advice. Peptides vary in legal and approval status by country, many are research compounds without full human safety data. Talk to a qualified clinician before starting anything.
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Last updated 2026-06-06.