PT-141
Libido
Centrally acting libido — bypass the vascular pathway of Viagra and Cialis entirely.
Also sold as
Research chemical vendors can't legally label products with the real name, so PT-141 often appears under coded SKUs. If you're shopping and see any of these, it's the same compound:
- PT141
- Branch-P141· Branch Peptides
- Bremelanotide
- Vyleesi (Rx)
Codes shown are for identification only.
Your draw
What it actually is
Bremelanotide is a melanocortin receptor agonist that acts on MC4R in the central nervous system. Unlike PDE5 inhibitors, it doesn't work on blood vessels — it works on desire itself.
Why people use it
- Low libido in men and women (FDA approved as Vyleesi for HSDD in women)
- Cases where Viagra/Cialis fail because the issue is desire, not vasculature
- Onset 30–60 minutes, lasts hours
Educational only · Not a vendor claim
How it works
Melanocortin receptor agonist acting centrally on MC4R — drives sexual desire, not blood flow.
Health benefits
- Increased libido (M and F)
- Works when PDE5 inhibitors fail
- Acts on desire, not just function
What you'll feel
- Onset 30–60 min
- Lasts 4–8 hours
- Stronger arousal and desire
Pros
- Works centrally — different mechanism from Viagra
- FDA approved for women (Vyleesi)
- Useful when vascular drugs fail
Cons
- Nausea common at higher doses
- BP elevation possible
- Mole darkening with chronic use
Side effects to know
- Nausea
- Facial flushing
- Headache
- Transient BP increase
Best suited for
Educational summary · Not medical advice · Discuss with a qualified clinician
Typical timeline
General pattern for the Sexual Health category. Individual response varies.
- Acute (PT-141, Oxytocin)Effect within 30–90 minutes. Facial flushing and slight nausea are common early on.
- Weeks 1–4 (Gonadorelin, HCG)Testicular volume returns on TRT. Fertility markers respond over 8–12 weeks.
Pairs well with
Common combinations experienced users run alongside PT-141. Always add one peptide at a time so you can attribute effects and side effects.
Read the safety guide before stacking.
The reconstitution math
- 1Reconstitute the 10 mg vial with 2 mL of bacteriostatic water. Tilt — don't shake.
- 2Concentration becomes 5,000 mcg/mL (5 mg/mL).
- 3For a 1 mg dose, draw 0.200 mL — that's 20 units on a 1 mL insulin syringe.
- 4One vial gives you approximately 10 doses.
Reminder: 100 units on an insulin syringe = 1 mL. Always start at half the listed dose for the first week and rotate injection sites between arms, legs, abdomen, and glutes.
Dose logging is available for signed-in users. Track today's dose and notes for PT-141.
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Mixing ratios, units to draw and storage basics — one page, no strings.
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Keep going from here
Everything on the site that connects to PT-141: comparable compounds, the exact math for this vial, and the tools to run the cycle.
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Tools for this protocol
Prefilled with 10 mg, 2 mL BAC water, and a 1 mg dose.
Printable units-to-micrograms lookup for every common vial and water volume.
Add PT-141 to a protocol with schedule, dosing, and a shopping list.
Log each dose so you can tie effects and side effects to real dates.
Put PT-141 next to two other peptides on dosing and goals.