Illustration — photo to followLot AV-PT1-2609-A
PT-141
Peptide pen · 10 mg / 3 mL
VAT included · 1 pen · 10 mg / 3 mL
Sold for research use only. Not a medicine and not authorised for human consumption. Purchasers must be 18+ and confirm intended use at checkout.
Authorised as a medicine elsewhere (United States) — this pen is a research product, not the licensed medicine.
- Ships chilled · same-day dispatch before 2 pm
- Free UK shipping over £300
About
What this is
PT-141 is included in the guide under hormones & sexual health. The reference focuses on central melanocortin signalling and sexual-health research and distinguishes biological rationale from demonstrated outcomes. Supplied by the manufacturer as a pre-filled 10 mg / 3 mL dose-dial pen for research use — no reconstitution, no vials, no drawing up. Our evidence record is linked below and graded on the same scale as every compound on this site.
- 01Pre-filled pen — no reconstitution
- 02Identity confirmed by LC-MS per lot
- 03Purity ≥ 99% by HPLC
- 04Certificate published against the lot number
Specification
What's in the pen
Device
How the pen works
- 01
Attach a pen needle
Take the cap off, wipe the septum with an alcohol swab and screw a compatible pen needle on until it seats. Use a fresh needle every time and never share a pen.
- 02
Prime
Dial a small test amount, hold the pen needle-up and press the button until a drop appears at the tip. This clears air from the needle and confirms the pen delivers.
- 03
Dial
Turn the dial to the volume you intend to deliver; the window shows the setting in the pen's increments. The dial sets a volume of solution — nothing more.
- 04
Inject
Insert as the pen-needle instructions describe, press the button fully and hold for ten seconds before withdrawing. Remove and bin the needle in a sharps container, recap and refrigerate.
Dosing is not provided; see the research information in the evidence record. These steps describe how the device operates, not how or whether to use its contents.
Certificate of analysis
Lot AV-PT1-2609-A
Independent test of a sample from lot AV-PT1-2609-A of PT-141. Testing confirms what is in the pen and how pure it is; it does not speak to safety or effect in people. How we test
Evidence record · reviewed 1 Sept 2026
What the research says about PT-141 (bremelanotide)
FDA-approved on-demand injection for low sexual desire in premenopausal women.
- Overall evidence
- Moderate
- Human evidence
- Approved medicine (for specific indications)
- Regulatory · jurisdictions on record
- Authorised
- Authorised · United States
- Not authorised · United Kingdom, European Union, Australia and Canada
- United Kingdom · No MHRA marketing authorisation; not available on the NHS. · reviewed 1 Sept 2026
- Anti-doping · WADA
- Not on the Prohibited List
Fit
Who this is for
Libido and arousal goals — the melanocortin agonist licensed for HSDD in the US.
- Libido or arousal that has dropped off
- Sexual-health goals not driven by blood flow
- Wanting the compound with FDA-approved human data
Check your fit
The Peptide Checkup maps your goal and history against the evidence for this pen and tells you if it is a poor fit — even after you have bought it.
Check your fit · 7 minutesAlso in the range · by shared goal, then bestsellers
