How Long Does PT-141 Last? Half-Life & Dosing Frequency

PT-141 has a reported half-life of ~2-3 hours. This page explains what that means for how long PT-141 stays active, how quickly it clears the body, and how often it is dosed in research.

What Is PT-141's Half-Life?

The half-life of a compound is the time it takes for the amount in the body to fall to half its original level. For PT-141, research reports a half-life of ~2-3 hours. A melanocortin-based peptide used for sexual dysfunction in both men and women.

How Long Does PT-141 Stay in Your System?

A compound is generally considered mostly cleared after about five half-lives. With a half-life of ~2-3 hours, PT-141 is largely cleared after roughly 15 hours. Individual metabolism, dose, and dosing frequency can shift this estimate.

What This Means for Dosing Frequency

Research protocols commonly use PT-141 As needed, max 1x per 24 hours (45 minutes to 2 hours before activity). Dosing frequency is generally matched to the half-life and to how long the compound's effects last — peptides with shorter half-lives are often dosed more frequently, while longer-acting compounds may be dosed less often.

Frequently Asked Questions

What is PT-141's half-life?

In the research literature, PT-141 is reported to have a half-life of ~2-3 hours. Half-life is the time it takes for the amount of a compound in the body to fall to half of its original level.

How long does PT-141 stay in your system?

As a general pharmacokinetic rule, a compound is mostly cleared after about five half-lives. For PT-141, with a half-life of ~2-3 hours, that works out to roughly 15 hours. Individual metabolism, dose, and dosing frequency can shift this.

How often is PT-141 dosed?

Research protocols commonly use PT-141 as needed, max 1x per 24 hours. Dosing frequency is generally matched to the compound's half-life and to how long its effects last.