PT-141 (bremelanotide) is a melanocortin-4 receptor agonist that became FDA-approved in 2019 for premenopausal HSDD based on the RECONNECT Phase 3 trials (Kingsberg et al. 2019). The pricing problem is unique: at ~$250 per branded autoinjector and a 1.75mg dose, FDA-approved bremelanotide is one of the highest per-mg prescription products on the market. Research-grade product runs at $5-15/mg, dropping per-dose cost to $4-15 — a ratio that explains why the research market exists for this peptide.
Research-context information only. PT-141 (bremelanotide) is the active ingredient in an FDA-approved product for premenopausal hypoactive sexual desire disorder; research-peptide and compounded forms are not FDA-approved and are sold for research purposes only. Protocols, doses, and reactions reported below come from clinical trials and community sources. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.
This guide covers documented per-mg pricing, how to verify a PT-141 COA (and why mass spec at 1,025 Da matters for the cyclic structure), which vial size matches the RECONNECT protocol, and red flags. For dosing itself, see the PT-141 dosing guide.
This is not a ranked vendor list — for that, see our Best PT-141 Vendors comparison.
Understanding PT-141 Pricing
PT-141 ships as a lyophilized powder in sealed glass vials. Three factors drive price: vial size, vendor markup, and whether the COA confirms both the cyclic structure (mass spec) and 98%+ purity (HPLC).
The pattern: 10mg vials are the most-cited size. They provide ~5-6 doses at the RECONNECT 1.75mg protocol, which fits inside the documented reconstitution stability window for nasal/SC bremelanotide.
Cost Per Dose at Common Protocols
Dose per Use
Doses per 10mg Vial
Cost per Dose ($60 vial avg)
Cost per Dose (kit)
1.0 mg (lower-end community)
10
$6.00
$4.50
1.75 mg (RECONNECT Phase 3)
~5-6
$10-12
$8-9
2.0 mg (higher community)
5
$12
$9
For current vendor-specific pricing, see our Best PT-141 Vendors comparison.
Cheapest single-vial option: Ion Peptide's 15% off drops the 10mg vial to $31.45 ($3.15/mg effective) — the lowest effective price we track for buying one vial. Get the code →
How to Verify PT-141 Quality
PT-141 is a cyclic 7-amino-acid melanocortin agonist with a specific Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH structure. The cyclization is what gives PT-141 its potency at MC4R — linear analogs of the same sequence are far less active. Without mass spec at 1,025.18 Da, identifying PT-141 versus a cheaper linear melanocortin in a PT-141-labeled vial is not possible.
What a COA Should Include
Identity Confirmation
Mass spectrometry confirming 1,025.18 Da for PT-141
Sequence verification — 7-residue cyclic structure with N-terminal acetylation
D-Phe substitution (not L-Phe) — D-isomer is critical for receptor affinity
Purity Testing
HPLC purity at 98%+
Single dominant peak; secondary peaks indicate degradation or incomplete cyclization
1,025 Da mass confirmation — significantly different mass indicates a related but distinct melanocortin (e.g., melanotan-2 at 1,024 Da with a different cyclization pattern)
Red Flags to Avoid
No COA available
Only in-house testing
Prices below $2/mg — extremely low pricing suggests substitution with cheaper related peptides
No mass spec — HPLC alone can't distinguish PT-141 from other 7-residue cyclic melanocortins
Vendor can't explain D-Phe vs L-Phe — legitimate suppliers know the chiral substitution
PT-141 reconstituted with bacteriostatic water and refrigerated is documented stable for roughly 28-30 days in published peptide-stability data. With sterile water (no preservative), the window collapses to ~24 hours.
Vial Size
At 1.75 mg/dose, 1×/week
At 1.75 mg/dose, 2×/week
At 1.0 mg/dose, 2×/week
5mg
~3 doses (3 weeks)
~3 doses (1.5 weeks)
5 doses (2.5 weeks)
10mg
~5-6 doses (5-6 weeks) ⚠️
~5-6 doses (3 weeks)
10 doses (5 weeks) ⚠️
20mg
~11 doses (11 weeks) ⚠️
~11 doses (5.5 weeks) ⚠️
20 doses (10 weeks) ⚠️
⚠️ = exceeds 28-30 day reconstitution stability window
Practical implication: A 10mg vial is the largest size aligned with twice-weekly use protocols inside the stability window. For once-weekly use, even a 10mg vial pushes the window — buyers commonly draw smaller doses or store carefully.
Vial Size by Protocol
Tolerance testing context:
A 5mg vial is the smallest unit cited for assessing nausea, flushing, and headache tolerance before committing to larger purchases
2-3 doses at the RECONNECT 1.75mg protocol
Standard episodic use (RECONNECT 1.75mg as-needed):
The most-cited size in community discussions and vendor sales data
2-4 vials per quarter at typical use frequency
Higher-frequency users:
10mg × 5 kit — drops cost to $2.20-6.00/mg
Each vial reconstituted only when needed; lyophilized vials stable 12+ months
Buying Multiple Smaller vs Kit
Factor
Multiple 10mg Singles
Kit (5× 10mg)
Cost per mg
Higher ($2.50-7.50/mg)
Lower ($2.20-6.00/mg)
Freshness
Same (lyophilized storage)
Same
Flexibility
Can stop mid-supply
Committed to full kit
Storage
Easier (smaller volumes)
Requires fridge space
Shipping
More frequent orders
Single shipment
Why PT-141 Costs More Than Most Research Peptides
PT-141 typically runs $2.50-7.50/mg vs $1-3/mg for simpler peptides like sermorelin. Three reasons documented in the literature:
1. Cyclic structure is harder to synthesize. The Asp-Lys cyclization requires controlled solid-phase peptide synthesis with specific protecting-group strategy. Linear analogs are 30-50% cheaper to manufacture.
2. D-Phe substitution. D-amino acids cost more than L-amino acids and require careful chiral purification.
3. Branded reference price. With FDA-approved bremelanotide at ~$250 per autoinjector dose, research vendors can sustain higher per-mg pricing than would otherwise be supported by synthesis cost alone.
The result: PT-141 is one of the few research peptides where per-mg cost reflects synthesis difficulty more than market clearing — a vendor selling PT-141 at sermorelin-like prices ($1-2/mg) is almost certainly substituting a cheaper related peptide.
Vendor Evaluation Methodology
When comparing PT-141 vendors:
Price Competitiveness (40%)
Normalize to cost per milligram. Account for vial-size economics — 10mg vials at $50 ($5/mg) score higher than 5mg at $35 ($7/mg).
COA & Testing (30%)
Third-party labs (Janoshik, MZ Biolabs, Colmaric)
Recent (within 6 months)
Verifiable task number
Mass spec confirming 1,025.18 Da
Reputation (30%)
Community feedback, shipping reliability, customer service, multi-year track record.
Shipping and Storage
Order Arrival
Lyophilized PT-141 typically arrives as a white or off-white powder cake:
Vial integrity — no cracks, intact rubber seal, aluminum cap secure
Powder appearance — solid cake or loose powder, NOT liquid or discolored
Labeling — batch/lot, mg content, "for research use only"
Cold pack — most reputable vendors include cold packs in summer
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Frequently Asked Questions
Is PT-141 legal to buy?
PT-141 (bremelanotide) is the active ingredient in an FDA-approved product for premenopausal hypoactive sexual desire disorder (HSDD). Research-grade bremelanotide is sold by peptide vendors for laboratory use only, labeled 'not for human consumption.' Purchasing research peptides is legal in most US jurisdictions, but you are not buying an FDA-regulated drug at this tier.
How much does PT-141 cost per dose?
At the RECONNECT Phase 3 dose of 1.75mg per use, a 10mg vial covers ~5-6 episodes. Research-vendor 10mg vials run $25-75, putting per-dose cost at $4-15. The branded prescription product runs roughly $250 per single-dose autoinjector — research-grade is 95%+ cheaper per dose.
What vial size should I buy?
10mg vials are the most-cited size in community discussions and vendor catalogs. They cover 5-6 doses at the RECONNECT 1.75mg protocol. 5mg vials carry significantly higher per-mg cost; 20mg vials are uncommon and risk exceeding the reconstitution stability window before use.
What purity should I look for in PT-141?
Third-party HPLC at 98%+ purity, plus mass spec confirming the 1,025.18 Da molecular weight. PT-141 is a 7-amino-acid melanocortin agonist (Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH). The cyclic structure is critical — linear analogs lack potency at MC4R.
Can I get PT-141 from a compounding pharmacy?
PT-141 has an FDA-approved branded version, so compounding pharmacies generally cannot compound it without a supply shortage designation. Some men's-health and women's-health telehealth clinics offer compounded bremelanotide, but the supply chain has tightened since 2023. Research vendors are the documented option for buyers in this category.
Why is PT-141 more expensive per mg than other peptides?
PT-141 has an FDA-approved branded counterpart (priced at ~$250/dose), which sets a high reference price. The synthesis is also more complex — the cyclic 7-amino-acid structure with N-terminal acetylation and a Nle (norleucine) substitution requires specialized peptide chemistry. Per-mg pricing is typically $5-15 vs $2-6 for simpler peptides.
This article is for educational and informational purposes only. It is not medical advice and should not be used to diagnose, treat, or prevent any condition. Consult a licensed healthcare provider before using any peptide.
