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PT-141.
PT-141. A melanocortin agonist that activates desire at its neurological origin. FDA-approved as Vyleesi. Not a vasodilator. A signal to want.
*Clinician-prescribed. Ships from a licensed U.S. pharmacy.
The formulation.
| Peptide | PT-141 (Bremelanotide) |
| Derived From | Synthetic melanocortin receptor agonist |
| Concentration | 2 mg/ml |
| Format | Sterile injectable solution |
| Route | Subcutaneous |
| Pharmacy | Licensed U.S. Compounding Pharmacy |
PT-141 is the only FDA-approved peptide that acts on sexual desire through the central nervous system. Unlike PDE5 inhibitors, which increase blood flow mechanically, PT-141 activates melanocortin-4 receptors in the hypothalamus. The signal originates in the brain, not the vasculature. That distinction matters because it means PT-141 addresses desire itself, not just the downstream mechanics. It works in both men and women, and the effect does not depend on the hormonal environment.
The mechanism
Desire Starts in the Brain. Not the Blood.
PDE5 inhibitors (Viagra, Cialis) increase blood flow. They address the hydraulics of erection without touching the motivation to want. PT-141 works upstream, in the hypothalamus, where melanocortin receptors MC3R and MC4R govern the neural architecture of sexual desire.
When PT-141 binds these receptors, it triggers dopamine release in reward circuits and oxytocin stimulation from the paraventricular nucleus. The result is the subjective experience of wanting. Not forced arousal. Not mechanical response. The drive to seek, to initiate, to want what your body had stopped asking for. This is why PT-141 works for both men and women: desire is neurological, not genital.
Complete your intake
No appointments. No waiting rooms.
Your prescription ships
Compounded by a licensed U.S. pharmacy. Cold-shipped.
Run the course
Follow your provider's dosing schedule.
Safety
What to expect+
Nausea occurs in approximately 40% of patients at the initial dose and diminishes with subsequent use. Flushing affects approximately 20%.
Headache and injection site reactions are reported at lower rates.
PT-141 may transiently increase blood pressure. A darkening of skin or gum pigmentation has been observed with repeated dosing.
Who should not use this+
Do not use if you are pregnant or breastfeeding.
Do not use if you have active cancer, chronic kidney disease, or untreated cardiovascular conditions.
Do not use if you are hypersensitive to peptide-based medications.
Long-term use may lead to desensitization of the melanocortin system, reducing effectiveness. Ask about alternate peptides to rotate between.
Do not exceed monthly maximums prescribed by your provider.
Regulatory context+
PT-141 (bremelanotide) is FDA-approved for hypoactive sexual desire disorder in premenopausal women (Vyleesi). This compounded formulation is prepared under section 503A in a licensed U.S. compounding pharmacy and requires a prescription from a licensed healthcare provider.
Frequently asked
What is PT-141?+
PT-141, also known as Bremelanotide, is a synthetic cyclic peptide derived from Melanotan II. Unlike blood-flow options, it targets sexual desire through the central nervous system. It's used to support desire and arousal signaling.
How does PT-141 work?+
It doesn't work on blood flow; it works upstream in the brain. PT-141 binds melanocortin receptors in the hypothalamus, which triggers dopamine release in reward circuits and oxytocin signaling. The result is the subjective experience of wanting, the drive that precedes the sexual response, which is why it works for both men and women.
What can I expect from PT-141?+
Many people find it supports desire at the neurological level, focusing on the motivation to want rather than the mechanics of performance. Because it doesn't work like blood-flow medications such as sildenafil, some use it as a complement rather than a replacement, and it can work for both men and women. Everyone responds differently, so results vary.
Are there any side effects?+
Nausea is the most common side effect, reported in roughly 40% of people, and it's usually worst at first and eases with continued use. Flushing affects about 20%, while headache and injection site reactions are reported less often. PT-141 may briefly raise blood pressure, and a darkening of skin or gum pigmentation has been observed with repeated use.
How is PT-141 made and shipped?+
It starts with a short online medical intake, and if it's a fit, a licensed U.S. provider writes the prescription. From there it's compounded at a licensed 503A pharmacy and batch tested by a third party for sterility and potency. Then it's shipped cold-packed right to your door.
What's the best way to buy PT-141?+
You've got two options. You can buy a one-time single vial, or you can go with the Build Your Stack subscription, which lets you mix and match the compounds in your monthly stack, starting at $189 per month. For ongoing use the stack is the better value, and you can pause, skip, or cancel anytime.
Stack your protocol.
A short course of work. Your cells carry it from there.
$220.00 · Clinician-prescribed · Ships from a licensed U.S. pharmacyThese statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Prescription products require an online consultation with a licensed provider who will determine if a prescription is appropriate.