Protocol
Sexual Health
PT-141 (Bremelanotide) Protocol [2026]
Central melanocortin receptor activation for sexual arousal research, distinct from PDE5 inhibitor mechanisms.
Compounds
PT-141
Dose: 1 mg
Freq: As needed, not more than once every 72 hours
Recon: 10mg + 2mL BAC
Conc: 5 mg/mL
Draw: 20 units (U-100)
Calculate PT-141 dose
Protocol Phases
Test Dose
First use only
0.5 mg subcutaneous 30 to 60 minutes before activity. Assess for nausea, flushing, and blood pressure changes before advancing dose.
Standard Dose
Subsequent uses
1 mg to 1.75 mg subcutaneous 30 to 60 minutes before activity. Maximum studied dose is 1.75 mg. Do not exceed once every 72 hours.
FAQ
How does PT-141 work differently from Viagra or Cialis?
PT-141 acts centrally on melanocortin MC3 and MC4 receptors in the brain to initiate arousal signals. Viagra and Cialis act peripherally on PDE5 enzymes in penile tissue to increase blood flow. PT-141 addresses the arousal pathway rather than the vascular pathway, and may work when PDE5 inhibitors do not.
What are the common side effects of PT-141?
Nausea is the most common side effect, occurring in a significant portion of users particularly at doses above 1.75 mg. Flushing and transient blood pressure changes are also reported. These are most common 1 to 2 hours after injection and typically resolve within 4 hours.
Can PT-141 be combined with PDE5 inhibitors?
Some research protocols combine PT-141 with low-dose sildenafil or tadalafil for additive effects through complementary mechanisms. The combination increases nausea risk and should be approached conservatively with the lowest effective dose of each compound.
How long before activity should PT-141 be injected?
Research subjects typically report onset between 30 and 90 minutes post-injection, with peak effects at 60 to 120 minutes. A 45 to 60 minute lead time is most commonly reported as optimal timing.
Research Notes
- Do not exceed 1.75 mg per dose or more than once per 72 hours.
- Having food in the stomach reduces nausea. A light meal 1 to 2 hours before dosing is commonly reported as helpful.
- Reconstitute in bacteriostatic water. Abdomen SubQ injection is most common.
For research use only. Not medical advice.