PT-141 Pre-Filled Pen

PT-141 PEN

Chemical Name

Bremelanotide — a synthetic cyclic heptapeptide and melanocortin receptor agonist. PT-141 commonly refers to bremelanotide or its acetate salt.

CAS Number

189691-06-3 (bremelanotide free base)

Researched Benefits of the Peptide

PT-141 has been studied for its effects on central melanocortin pathways associated with sexual desire and arousal. Clinical evidence relates to regulated pharmaceutical bremelanotide formulations and should not be assumed to apply to an unapproved research pen.

• Established human evidence: Randomized Phase 3 trials found improvements in sexual desire and related distress in selected premenopausal women with acquired, generalized hypoactive sexual desire disorder.

• Mechanistic research: Bremelanotide activates melanocortin receptors, including MC4 receptors involved in neural pathways associated with sexual motivation.

For research use only.

Kit Includes:

1x Peptide Pen

20x Pen Tips

10x alcohol swabs

(extra pen tips can be bought separately) 

Shipping Notice:

Please note that our peptide pens require strict overnight shipping, as they remain stable for a maximum of 2 days while in transit. To protect product integrity, these items are dispatched via a specialized cold-chain courier system, ensuring they are kept cold for most of their journey. Because of these tight temperature constraints, if you live in a regional or remote area where reliable overnight delivery is unavailable, we strongly advise ordering our standard lyophilized (freeze-dried) vials instead, as they are significantly more stable during extended transit times.

Product Longevity and Expiry

At BioLabs, we pride ourselves on delivering the purest, highest-potency products available on the market today. While many companies sell mass-produced peptide pens that have been sitting on warehouse shelves for weeks—critically reducing their effectiveness before they even reach your door—we take a completely different approach. Every single BioLabs peptide pen is made to order, formulated either the exact day of or the day before shipping to ensure you receive maximum potency and freshness.

Because our products are freshly compounded without unnecessary stabilizing fillers, we provide a strict 6-week efficacy guarantee from the date of manufacture. While your pen will likely remain stable and last longer if stored correctly under refrigeration, we strongly advise against using the product beyond this 6-week timeframe to guarantee optimal results and safety.