Source comparison
PT-141 Half Life: Comparison Table
PT-141 (Bremelanotide) 2–3 hours 6–12 hours As needed, max 24hr intervals MC3R/MC4R agonist. Activates hypothalamic arousal pathways via cAMP cascade Short plasma half-life but long functional duration due to downstream signaling. Dose 45–60 min before intende
This comparison does not assign a generated winner or score.
- PT-141 (Bremelanotide)
- 2–3 hours
- 6–12 hours
- As needed, max 24hr intervals
- MC3R/MC4R agonist. Activates hypothalamic arousal pathways via cAMP cascade
- Short plasma half-life but long functional duration due to downstream signaling. Dose 45–60 min before intended effect
- Melanotan II
- 1–2 hours
- 6–8 hours
- As needed or daily
- Non-selective melanocortin agonist (MC1R, MC3R, MC4R, MC5R). Broader side effect profile
- Similar half-life to PT-141 but less receptor-selective. Higher incidence of nausea and skin darkening
- Kisspeptin-10
- 30–40 minutes
- 2–4 hours
- Multiple daily doses required
- KISS1R agonist. Stimulates GnRH release upstream of sex hormone production
- Much shorter functional duration. Requires continuous dosing for sustained effect, not comparable to PT-141's as-needed profile
- Oxytocin
- 3–5 minutes
- 30–60 minutes
- Continuous infusion or frequent repeat dosing
- Oxytocin receptor agonist. Prosocial and bonding effects, minimal direct arousal mechanism
- Extremely short half-life. Requires nasal spray or IV infusion, not comparable to PT-141 for arousal protocols