Tadalafil
A prescription medicine, best known as Cialis, that relaxes blood vessels so more blood can reach the penis during arousal.
Learn about TadalafilSexual & relational wellness
PT-141
Also known as: Bremelanotide
A prescription medicine, sold as Vyleesi, that works on arousal signals in the brain instead of on blood flow.
- Class
- Melanocortin medicine
- Drug name
- Bremelanotide (Vyleesi)
- Approved for
- Premenopausal women
- FDA status
- FDA-approved (one use)
Overview
What it is
PT-141 is the research name for bremelanotide, sold as Vyleesi. It switches on melanocortin receptors in the brain, so it works on desire signals rather than on blood flow to the genitals.
PT-141 has an unusual origin. It came out of research on melanotan 2, a tanning compound, when researchers noticed an unexpected effect on arousal and followed that thread instead.
It was approved in 2019 under the name Vyleesi for one situation: premenopausal women with acquired, general low sexual desire that causes them real distress.
The label is unusually specific about what it is not for. It states plainly that it is not approved for women past menopause, not approved for men, and not approved to improve sexual performance.
Benefits
What it supports
- FDA-approved for premenopausal women with low sexual desire that causes them distress
- Works through brain arousal signals, so it fits a different situation than blood-flow medicines
- Gives providers an option to weigh when a blood-flow medicine is not the right match
- Any use outside the approved group is off-label and is a provider's call
Mechanism
How it works
1
Most sexual-wellness medicines work on blood flow. PT-141 does not.
2
It switches on melanocortin receptors in the brain, in regions involved in desire and arousal. The signal starts in the nervous system rather than in blood vessels.
3
That is why it is described as working on wanting rather than on the physical response. It addresses a different part of the picture than a blood-flow medicine does.
4
It is used as needed before activity rather than every day. The same receptor family explains its side effects, including nausea and darker patches of skin.
Context
Who it's for
Premenopausal women with low sexual desire that troubles them, discussing the approved use with a provider
People trying to understand the difference between desire and physical response
Adults comparing a brain-acting option with blood-flow medicines like tadalafil
Anyone sorting out how PT-141 relates to melanotan 2, since the two share a starting point
Landscape
In the landscape
How this therapy compares to related options—not a recommendation.
- Melanotan 2
The compound PT-141 came from. It reaches more receptors, has never been approved, and carries serious safety concerns.
- Tadalafil
Works on blood flow rather than on brain signals, so it addresses a different part of the picture. Both sit in the sexual & relational wellness area of the library.
- Oxytocin Acetate
Tied to closeness and calm rather than desire signals or blood flow. Another pathway in the same sexual-wellness area.
Provider-directed
What providers review
- Your sexual health history and what specifically feels different
- Blood pressure and heart health, since it briefly raises blood pressure
- Medicines you take now, including anything else for sexual wellness
- How well you tolerate nausea, which is the most common side effect
- Mood, relationship context, and other causes worth ruling out first
For therapies that require medical evaluation, every protocol is designed by a licensed provider.
Suitability for PT-141 is determined by a licensed provider after evaluation.
In this area
Related therapies
Other compounds that support overlapping wellness goals.
Oxytocin Acetate
A lab-made form of the hormone often nicknamed the bonding hormone, tied to trust, closeness, and calm.
Learn about Oxytocin AcetateMelanotan 2
A lab-made copy of the hormone that tells skin to make pigment; it also touches appetite and arousal signals, and carries real safety concerns.
Learn about Melanotan 2Questions
PT-141 FAQ
Good to know
Regulatory & considerations
Bremelanotide (PT-141) is FDA-approved for one specific use: premenopausal women with acquired, general low sexual desire that causes distress. Its label states it is not approved for women past menopause, not approved for men, and not approved to boost sexual performance. Any other use is off-label and is decided by a licensed provider.
Therapies that require medical evaluation are sourced from FDA-regulated 503A compounding pharmacies.
For therapies that require medical evaluation, every protocol is designed by a licensed provider.
The approval covers premenopausal women only. Use by men or by women past menopause is off-label and is a provider's decision.
Nausea is common, affecting a large share of people in the trials, and it is usually worst with the first dose.
It raises blood pressure briefly after each dose, so it is not used by people with uncontrolled high blood pressure or known heart disease.
A small number of people develop darker patches of skin on the face, gums, or breasts, and that darkening does not always fade.
Shop PT-141
See current pricing and availability for PT-141 in our shop. If a medical evaluation is needed, a licensed provider guides you through it.
Individual results vary. General information on this site is not a substitute for professional medical advice.