Source comparison
PT-141 Alternative to Vyleesi: Side-by-Side Comparison
Active Molecule Bremelanotide (synthetic MC4R agonist) Bremelanotide (identical molecule) Bremelanotide (claimed. Verify via HPLC) Pharmacologically identical across all three when sourced correctly FDA Status FDA-approved finished drug product Compounded unde
This comparison does not assign a generated winner or score.
- Active Molecule
- Bremelanotide (synthetic MC4R agonist)
- Bremelanotide (identical molecule)
- Bremelanotide (claimed. Verify via HPLC)
- Pharmacologically identical across all three when sourced correctly
- FDA Status
- FDA-approved finished drug product
- Compounded under USP <797> by 503B facilities
- Not approved. Sold as research chemical only
- Vyleesi has formal regulatory approval; compounded is legal but not FDA-reviewed as finished product
- Cost Per Dose
- $800–$1,000
- $80–$200
- $40–$80
- Compounded offers 70–80% cost reduction; research-grade cheapest but highest risk
- Prescription Required
- Yes. Prescriber oversight mandatory
- Yes. Via telehealth or in-person provider
- No. Sold 'not for human consumption'
- Prescription pathways ensure medical screening; research-grade bypasses oversight entirely
- Delivery Format
- Pre-filled autoinjector (1.75mg)
- Lyophilised powder + bacteriostatic water
- Lyophilised powder (reconstitution required)
- Autoinjector is most convenient; powder requires sterile technique and cold storage
- Purity Verification
- FDA batch testing (>99% typical)
- 503B facilities test per batch (98–99.5%)
- Varies widely (92–99.8% based on third-party testing)
- Vyleesi and 503B-compounded offer consistent purity; research-grade requires independent HPLC verification
- Storage Requirements
- 2–8°C refrigerated until use
- −20°C before reconstitution, 2–8°C after
- All three demand cold-chain integrity. Temperature excursion ruins peptide structure irreversibly
- Onset & Duration
- 45–90 min onset, 6–8 hr duration
- Variable (depends on purity and degradation)
- Mechanism is identical. Onset/duration differences reflect purity and storage handling, not formulation