Overview
Vyleesi.
FDA-approved for low sex drive in women.
Works on arousal in the brain, not blood flow.
Take it 30–90 minutes before sex.
What It Does
FDA-approved melanocortin agonist for HSDD, activates MC4R in the brain to increase sexual desire and arousal centrally.
Activates MC4R in hypothalamic arousal circuits.
Unlike PDE5 inhibitors (blood flow), PT-141 works on the brain; see the comparison on the next page.
Reconstitution
| Vial Size | BAC Water / Solvent | Concentration |
|---|---|---|
| 10 mg | + 1 mL | 10 mg/mL |
Reconstitution Calculator
Enter the vial amount and diluent volume to calculate concentration. If you already have a target amount, you can also convert it to liquid volume and syringe markings. This tool does not recommend a target amount.
Enter a target amount you already have and select the syringe capacity.
Mathematical reference only. The calculator does not determine an appropriate target amount. Syringe capacity only changes the maximum volume that fits.
Protocol
| Phase | Frequency | Amount | Notes |
|---|---|---|---|
| FDA dose | As-needed | 1.75 | FDA-approved Vyleesi dose. |
| Community | As-needed | 1–2 | Off-label research. |
| Max | 1×/day, | – | FDA Vyleesi label: max 1 dose per 24 hours AND max 8 doses per month. Exceeding 8/month carries significantly |
As-needed (situational) per FDA Vyleesi label. Max 1 dose per 24 hours; max 8 doses per month. Not for daily or scheduled use.
Single shot 30–90 min before sexual activity (situational).
FDA-approved (Vyleesi) for premenopausal women with low sexual desire (HSDD). Nausea common. Men: Began as a men’s erectile-dysfunction drug (acts in the brain, adds to sildenaf FDA-approved (Vyleesi) for premenopausal women with low sexual desire (HSDD). Nausea common. Men: Began as a men’s erectile-dysfunction drug (acts in the brain, adds to sildenafil).
Handling & Stacking
- Freeze-dried: -4°F.
- Reconstituted: 36–46°F.
- Best used within 28 days.
- No clear reconstituted-potency data (the label lists only an in-use date, not potency), so defer to the 28-day sterility limit.
- Nausea, flushing, BP elevation (transient).
- Less nausea PM vs AM.
- Focal hyperpigmentation (face/gums/breasts): ~1% with intermittent as-needed use, but 38% when dosed daily for 8 consecutive days (FDA Vyleesi label); argues strongly against scheduled daily dosing.
- Sexual desire and arousal within 30–60 min.
- Duration 6–24 hours.
- Nausea and flushing common, less if dosed in the evening.
- Use caution if combining with PDE5 inhibitors (sildenafil, tadalafil); additive transient BP and HR effects; not an FDA-labeled contraindication.
- Uncontrolled hypertension (transient BP rise on injection).
- PDE5 inhibitors at peak (additive transient BP elevation).
- Cardiovascular disease Next page: how PT-141 compares to Viagra and Cialis (desire vs blood flow, which fixes which problem), plus the full safety block.
- PT-141 vs VIAGRA & CIALIS, AND SAFETY
- They fix different problems, which is why one can work when the other doesn’t.
- Viagra and Cialis are plumbing, they open blood flow so an erection can happen, but only if you’re already turned on.
- PT-141 is the brain, it creates the wanting.
- Quick test: “want to but can’t” → Viagra/Cialis. “Can but don’t want to” → PT-141.
What It Does
Brain, switches on desire/arousal Blood flow, keeps an erection holding Works without arousal? Yes, it creates the arousal No, you must already be aroused Best for Low desire; or pills work but you feel nothing Erection trouble, on demand Erection trouble; also BPH How to take SubQ, 45 min–2 h before; max 1/24 h, 8/month Pill ~1 h before; 25/50/100 mg Pill 10/20 mg PRN, or 2.5–5 mg daily Lasts ~6–24 h ~4–6 h Up to 36 h FDA-approved Women (HSDD), as Vyleesi; men off-label Yes; erectile dysfunction in men Hard no Melanoma / atypical moles; uncontrolled BP; Never with nitrates (nitroglycerin, “poppers”); dangerous BP crash. Cialis: none within 48 h heart disease Together? Different systems, so combining is plausible and under study; but both affect blood pressure, so stacking at peak can cause dizziness. Clinician conversation, not a DIY stack. Honest read: the pills are the proven, approved, cheap option for men; PT-141 is the one that treats desire, which they can’t; but for men it’s off-label, injected, and nausea is common.
Safety & Patient Education
- Hyperpigmentation of all melanocytes including existing moles (mole monitoring required); new mole formation.
- Transient BP elevation (~6 mmHg systolic per Vyleesi label).
- Nausea (most pronounced AM, less PM).
- Reduced response / tachyphylaxis with frequent use.
- PDE5 inhibitors (sildenafil, tadalafil, vardenafil): additive BP; separate timing per label.
- Antihypertensives / vasoactive drugs: additive or paradoxical BP effects.
- Naltrexone: decreases naltrexone exposure significantly.
- Narrow-TI oral meds: delayed absorption.
- Blood pressure before each dose (bremelanotide transiently raises BP and lowers heart rate 2–4 h post-dose – skip it if you’ve got uncontrolled hypertension or known cardiovascular disease).
- Dermatology baseline mole mapping (photographic), repeat every 12 weeks during active use and every 6–12 months after (melanocortin agonist can darken skin and moles)., Out of range?
- A BP spike after dosing or a new/changing mole = stop and get checked; don’t use it with heart disease or high blood pressure that isn’t controlled.
- Photograph moles at baseline; recheck monthly (ABCDE: Asymmetry, Border, Color, Diameter >6mm, Evolution).
- Use sunscreen, extra melanin doesn’t replace UV protection.
- Do not exceed 1 dose/24 h or 8 doses/month (Vyleesi label).
- Erection >4 h is a medical emergency.
- Tell any prescriber before combining with an ED pill.
