Is PT-141 the same as Vyleesi?

Vyleesi is the FDA approved brand name for bremelanotide, which is often called PT-141. Compounded versions prescribed by clinicians contain the same active ingredient but are not FDA approved products, and quality depends on the pharmacy that makes them.

Does PT-141 work for men?

PT-141 is not FDA approved for men. Early studies looked at it for erectile problems, and some clinicians prescribe it off-label, but the evidence in men is more limited than in the trials that led to approval for women.

How long does PT-141 nausea last?

In trials nausea was most common after the first dose and usually became less frequent with later doses. Tell your clinician if nausea is severe or keeps you from using the medicine.

Can I take PT-141 with ED pills?

Some clinicians combine treatments, but both can affect blood pressure and heart rate. Do not combine them on your own. Your clinician needs your full medication list to decide what is safe.

Is PT-141 safe with high blood pressure?

No, not when blood pressure is uncontrolled. PT-141 briefly raises blood pressure after each dose, so it is not recommended for people with uncontrolled hypertension or known cardiovascular disease.

Does PT-141 cause skin darkening?

It can. Darkening of the face, gums, or breasts was reported, more often with frequent use, and it did not always resolve after stopping. Report any new skin changes to your clinician.

PT-141 (Bremelanotide): How It Works and Side Effects

PT-141, also called bremelanotide, is a prescription peptide that acts on melanocortin receptors in the brain to increase sexual desire. It is FDA approved under the brand name Vyleesi for premenopausal women with acquired, generalized hypoactive sexual desire disorder (HSDD). It is taken as an on-demand injection under the skin, not as a daily medication.

This guide covers how PT-141 bremelanotide injection works, who it is approved for, how it differs from ED pills, the side effects people notice most, and who should not use it. It is part of our peptide therapy library and builds on our peptide therapy guide.

What is PT-141 (bremelanotide)?

PT-141 is a synthetic peptide related to a natural hormone called alpha-melanocyte stimulating hormone. It activates melanocortin receptors, mainly the MC4 receptor, in brain areas linked to sexual motivation. The FDA approved it as Vyleesi in June 2019. It was the second approved medicine for low sexual desire in premenopausal women, after flibanserin (Addyi).

How is PT-141 different from ED pills like sildenafil?

ED pills such as sildenafil and tadalafil work on blood flow. They help the body respond once arousal is already there. PT-141 works in the brain and targets desire itself. That is why it was studied for low desire rather than for erection problems. For a closer look at ED pills, see sildenafil vs tadalafil.

Feature	PT-141 (bremelanotide)	PDE5 pills (sildenafil, tadalafil)
Where it acts	Brain (melanocortin receptors)	Blood vessels
Main target	Sexual desire	Erection firmness
FDA approved use	Acquired, generalized HSDD in premenopausal women	Erectile dysfunction in men
Form	Injection under the skin, as needed	Tablet
Use in men	Off-label only	Approved

Who is PT-141 approved for?

The FDA approval covers premenopausal women with low sexual desire that causes distress, that started after a period of normal desire, and that happens in all situations and with all partners. The low desire must not be better explained by another medical or mental health condition, relationship problems, or the effects of another medicine. It is not approved for postmenopausal women or for men. Some clinicians prescribe it to men off-label, and the evidence there is more limited.

What are the side effects of PT-141?

Nausea is the most common side effect. In the clinical trials about 40 percent of women reported nausea, most often after the first injection, and it usually eased with later doses. Other common effects include flushing, injection site reactions, and headache.

Common: nausea, flushing, injection site reactions, headache, vomiting.
Blood pressure: a short rise in blood pressure and a drop in heart rate after each dose, usually gone within about 12 hours.
Skin darkening: focal hyperpigmentation of the face, gums, or breasts was reported, especially with frequent use, and it did not always go away after stopping.

Who should not use PT-141?

PT-141 is not right for everyone. Your clinician will review your health history before prescribing. Use this checklist to prepare.

Uncontrolled high blood pressure or known heart disease: PT-141 should not be used.
Taking naltrexone by mouth: PT-141 can lower naltrexone levels, which may make it less effective.
Pregnant or trying to conceive: stop using it and talk to your clinician.
History of skin darkening or a high cardiovascular risk: discuss before starting.
Taking other medicines that need steady stomach absorption: PT-141 can slow stomach emptying.

How do you get PT-141 through telehealth?

A licensed clinician reviews your symptoms, health history, blood pressure, and medicines through an online intake. If PT-141 is appropriate, a licensed pharmacy ships it to you, and your clinician explains how and when to use it. Follow-up visits check how it is working and whether side effects are manageable. See how it works for the full process.

Bottom line

PT-141 is one of the few medicines that targets sexual desire directly rather than blood flow. It has a narrow approved use, a well known nausea profile, and real cardiovascular cautions. A careful clinician review is what makes it safe to try. Explore sexual health treatments to compare your options.

Frequently asked questions

Related treatments

Explore the clinician-supervised programs StemVera offers for the conditions and medications discussed in this article.

Treatment