PT-141

What it is: Bremelanotide — a melanocortin receptor agonist that acts directly on the brain's sexual arousal centers, working independently of blood flow (unlike Viagra).

What it does: Expect increased sexual desire and arousal for both men and women, stronger erections (men), heightened sensation, and rapid onset. Works through the nervous system, not vascular dilation.

How it's used: Subcutaneous injection 30-60 minutes before activity.