PT-141 Price Guide 2026: How Much Does Bremelanotide Cost?

PT-141 (bremelanotide) is one of the most distinctive peptides in the research market — it is the only compound covered on this site with full FDA drug approval, it works through a central nervous system mechanism rather than vascular pathways, and it has clinical applications for both men and women. Research-grade 10mg vials currently start at $54.99. This guide covers pricing, how it compares to the prescription version, and what makes its mechanism unique.

Current PT-141 Research Peptide Prices

PT-141 is currently available from three suppliers in our tracking database, all in 10mg vial format. All prices in USD, updated nightly.

Research-Grade PT-141 vs. Vyleesi (Prescription)

The price difference is stark: research-grade PT-141 at $5.50/mg versus the FDA-approved Vyleesi at roughly $514/mg (a 1.75mg auto-injector retailing at ~$900). This reflects the enormous cost of FDA drug approval, pharmaceutical manufacturing standards, liability coverage, and the commercial infrastructure behind a branded drug. The two products are not equivalent or interchangeable, but the price gap illustrates why the research peptide market exists for this compound.

What Is PT-141 and How Was It Discovered?

PT-141 is a cyclic heptapeptide — a chain of seven amino acids arranged in a ring structure — derived from the core active fragment of MT-II. The cyclic structure improves stability and receptor selectivity compared to its linear predecessors. Its molecular weight is approximately 1025 Da, and its chemical name is cyclo(Nle-cyclo(Asp-His-D-Phe-Arg-Trp-Lys))·acetate.

How PT-141 Works: Central vs. Vascular Mechanism

Understanding PT-141's mechanism requires contrasting it with how PDE5 inhibitors like sildenafil work:

• PDE5 inhibitors (Viagra, Cialis) — Work peripherally by inhibiting the enzyme that breaks down cGMP, a signaling molecule that relaxes smooth muscle in blood vessel walls. The result is increased blood flow to genital tissue. They have no direct effect on desire or arousal at the brain level — they facilitate a physical response but do not create the underlying motivation.
• PT-141 (bremelanotide) — Works centrally through the nervous system. It activates melanocortin receptors, particularly MC4R in the hypothalamus and limbic system — brain regions involved in motivation, reward, and sexual arousal signaling. The mechanism is closer to influencing the neurological drive for sexual activity rather than the vascular mechanics of the response.

This distinction matters both mechanistically and in terms of which populations may benefit from research into each approach. PT-141 is also one of the few compounds in either market studied in both men and women — PDE5 inhibitors are primarily used by men, while PT-141's central mechanism is relevant regardless of sex.

What Researchers Study PT-141 For

• Hypoactive sexual desire disorder (HSDD) — The primary indication behind FDA approval. HSDD is characterized by persistent absence of sexual thoughts, desire, and interest, causing personal distress. The FDA's approval covered premenopausal women specifically.
• Male sexual dysfunction — Research has examined PT-141 in men with erectile dysfunction who do not respond adequately to PDE5 inhibitors, given the different mechanism of action.
• Melanocortin system research — The MC4R receptor targeted by PT-141 is involved in multiple physiological processes including energy homeostasis, mood, and inflammation, generating broader basic science interest beyond sexual function.
• Neuroprotection and mood — Some research has examined melanocortin system modulation in contexts beyond sexual health, including pain sensitivity and mood disorders in animal models.

Is PT-141 Legal to Buy?

Research-grade PT-141 is not a scheduled controlled substance in the United States. It is sold legally by research peptide suppliers for laboratory use with "not for human consumption" labeling. The existence of the FDA-approved drug Vyleesi does not make the research chemical market for PT-141 illegal — a compound can be both an approved pharmaceutical and a legal research chemical simultaneously, sold for different purposes under different regulatory frameworks.

PT-141 is not currently listed on the WADA prohibited substances list as a standalone compound. Athletes should verify current WADA list status and any applicable sport-specific rules before use.

Notable Research Suppliers (2026)

What to Look for in a PT-141 Supplier

• HPLC purity ≥ 98% from a named independent lab — The testing lab should be identifiable. In-house testing alone is insufficient for a compound with this level of biological activity.
• Correct molecular weight (≈ 1025 Da) — Mass spectrometry data confirming identity is ideal. PT-141's cyclic structure makes sequence confirmation important — a linear impurity could have a very different pharmacological profile.
• Lyophilized powder, not pre-dissolved — Should arrive as freeze-dried powder. Pre-dissolved PT-141 has shorter stability and is a quality red flag.
• Cyclic structure confirmation — Some COAs explicitly confirm the cyclic conformation. This is above-average documentation but worth seeking for a compound where the ring structure is key to its selectivity.

Frequently Asked Questions