PT-141 + Melanotan II

What it is

This pairing covers both ends of the melanocortin story: Melanotan II run daily for a few weeks gives you a tan and a steady lift in sex drive, and PT-141 taken an hour or two before intimacy spikes desire on demand. Both work through the brain rather than blood flow, both cause nausea and flushing until you learn your dose, and both deserve a low first shot.

The people who buy both are usually couples where desire, not plumbing, is the problem, and someone who also wants a tan without burning. Women are the group PT-141 is actually approved for (as Vyleesi, for low desire before menopause), and it works in men too. Melanotan II is the choice when you want the tan and are happy to take the libido and appetite drop that come with it. If erections are the issue, a prescription PDE5 drug is better proven and cheaper. If you want libido without the tan, PT-141 alone is the cleaner buy. If you want the tan with fewer side effects and no libido push, Melanotan I.

Timelines are different for each vial, which is the whole reason they are two vials. Melanotan II: the first few doses bring flushing and queasiness for 20 to 60 minutes, and sometimes a spontaneous erection in men; by week two the skin darkens, faster with a little sun, and libido climbs as a background hum. By week four to eight you hold the tan at two or three shots a week. PT-141: nothing for 45 minutes, then a flush, often nausea, and over the next two to six hours a noticeable rise in desire and arousal that is not tied to a partner doing anything. It lasts into the next day for some people. Neither does anything for someone whose problem is pain, a relationship, or a medication side effect.

Run them on their own schedules and do not combine them until you know each. Melanotan II: 250 to 500 mcg subQ (just under the skin with an insulin needle) once a day in the evening so you sleep through the nausea, for four to eight weeks, then two or three times a week to hold. Our advice is a 100 mcg test shot the first night before stepping up. PT-141: 200 mcg the first time, 500 mcg as the usual dose, and up to 1 mg only if 500 was clearly not enough, 45 minutes to two hours before, never more than one shot in 24 hours and no more than eight a month. Nausea is dose-driven, which is why the first shot is small; the approved Vyleesi pen is 1.75 mg, and we stop at 1 mg. Mix each 10 mg vial with about 3 ml of water. A 10 mg PT-141 vial is twenty doses at 500 mcg; a 10 mg Melanotan II vial is 20 daily loading shots at 500 mcg or 40 at 250 mcg, so a longer load needs a second vial. The mistakes: dosing both the same evening the first week, taking PT-141 on a full stomach (it works, you just feel worse), and skipping the photo of your moles.

The evidence is split. PT-141 is a real approved drug: two large trials in women with low desire showed a modest but real improvement in desire scores against placebo, with nausea in about four in ten and most people adapting after a few doses. Melanotan II never finished development; it has small human studies from the 1990s on tanning and on erections in men, then went straight to the gray market. What is well documented for both is the blood pressure bump after each dose (the reason for the eight-a-month limit) and, for Melanotan II, darkening of moles and freckles and reports of new ones, which is why anyone with a lot of moles or a melanoma history should skip it.

Not worth it if you only need one of the two: PT-141 alone for desire, Melanotan I alone for a gentler tan. Oxytocin is the alternative when the gap is connection and warmth rather than drive. Skip the pair entirely with uncontrolled blood pressure, heart disease, a melanoma history, or a lot of moles; and if you are a man prone to prolonged erections, Melanotan II is the one to leave out.

What people use it for

Safety, in brief

The full picture — stop signs and who should talk to a doctor first — is on the dosing guide.

Sources

The labels and studies behind this page. Each link opens the original on PubMed, DailyMed or ClinicalTrials.gov.

1. Vyleesi (bremelanotide) prescribing informationDailyMed: Vyleesi (bremelanotide) · Label
2. Bremelanotide for the Treatment of Hypoactive Sexual Desire Disorder: Two Randomized Phase 3 TrialsKingsberg et al., Obstet Gynecol 2019 · Trial
3. Evaluation of melanotan-II, a superpotent cyclic melanotropic peptide in a pilot phase-I clinical studyDorr et al., Life Sci 1996 · Trial
4. Synthetic melanotropic peptide initiates erections in men with psychogenic erectile dysfunction: double-blind, placebo controlled crossover studyWessells et al., J Urol 1998 · Trial