Buy PT-141 for sale online from Alpha Labs

FORM: 5mg/vial.

USA made with 100% quality assurance guarantee.

Buy PT-141 Peptide. Also known as Bremelanotide.

PT141 is a copy of a hormone which has an effect on the nervous system called alpha-melanocyte-stimulating hormone.  Its amino acid sequence is Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH and has an average elimination half-life of 2.7 hours. It is an active metabolite of Melanotan 2 peptide that lacks the C-terminal amide group, however, PT-141 does not significantly stimulate melanogenesis (increased pigment formation) unlike Melanotan 2.

PT-141 acts as non-selective agonist of the melanocortin receptors, primarily as agonist of melanocortin receptors 3 & 4 (MC3 & MC4) and with the exception of melanocortin receptors 2 (MC2 – the receptor of ACTH). Its bioavailability at subcutaneous injection is about 100%, maximal levels occur after about 1 hour, with a range of 0.5 to 1.0 hours and the plasma protein binding of PT-141 is approx 21%.

It has been established that melanocyte-receptors in the brain play a part in several behaviours including sexual arousal. So stimulating these receptors using it may stimulate sexual function. A study of around 40 female rats showed a three- to five-fold increase in solicitations in rats who were given the drug compared to those which were not.

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PT-141 (Bremelanotide) chemical structure

Studies in the early 1960s showed that administration of α-MSH caused sexual arousal in rats, sparking interest in α-MSH.

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Peptides Prefer the Cold

Keep peptide vials refrigerated at all times to reduce peptide bond breakdown. DO NOT FREEZE. Most peptides, especially shorter ones, can be preserved for weeks if careful.

Always swab the top of the vial with an alcohol wipe, rubbing alcohol or 95% ethanol before use.

Before drawing solution from any dissolved peptide vial, fill the pin with air to the same measurement you will be filling with solution, ie. if you plan to take 0.1 ml, first fill the pin with 0.1ml of air, push the air into the vial, and then draw the peptide back up to the 0.1 ml marker. Doing so will maintain even pressure in the vial. Always remember to remove air bubbles from the pin by flicking it gently, needle side up, and pushing bubbles out. In addition, push out a tiny amount of solution to ensure there is no air left in the metal tip.


Only Mix With Sterile Bacteriostatic Water

The purity and sterility of bacteriostatic water are essential to prevent contamination and to preserve the shelf-life of dissolved peptides.

Push the pin through the rubber stopper at a slight angle, so that you inject the bacteriostatic water toward the inside wall of the vial, not directly onto the powder.

Lyophilized peptide should be stored at -20°C (freezer), and the reconstituted peptide solution at 4°C (refrigerated). Do not freeze once reconstituted.


Do Not Shake Vial To Mix

Air bubbles are unfavorable to the stability of proteins.

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Additional information




White Lyophilized Powder





Molecular Formula


Molecular Weight

1,025.2 g/mol