What peptides increase libido?

PT-141 (bremelanotide) is approved in the US for hypoactive sexual desire disorder in premenopausal women. Melanotan II often raises arousal as a side effect but is not approved. Kisspeptin is research-only.

Does PT-141 work for men and women?

The approved indication is for premenopausal women with HSDD. Anonymous reports here include both women (#117) and men (#67) describing stronger desire or arousal. That is not the same as an approved use in men.

Is Melanotan II safe for libido?

Melanotan II is not an approved medicine. Users report arousal (#109, #111) and also mole darkening (#82). Changing moles need medical review.

Peptides for Libido: What the Evidence and Users Say

Peptides for libido — PT-141, Melanotan II, kisspeptin — approved uses, research and what anonymous users report. Not medical advice.

Anonymous user report. Not medical advice. Peptides discussed are not FDA-approved for the uses described. Editorial process →

Short answer

Libido (desire) is not the same as erection or lubrication. The peptide with an approved sexual-medicine use is bremelanotide (PT-141), approved in the US as Vyleesi for acquired, generalised hypoactive sexual desire disorder in premenopausal women — not as a general 'libido booster' for everyone. Melanotan II is an unapproved tanning peptide that often raises arousal as a side effect. Kisspeptin sits upstream of reproductive hormones and is research-only. Peptide Confessions does not publish dosing, timing, injection or sourcing guidance.

Compounds people mean

Compound	What it is	Evidence / status	Published confessions
PT-141 (bremelanotide)	Melanocortin agonist	US-approved as Vyleesi for HSDD in premenopausal women	10
Melanotan II	Unapproved tanning peptide	Arousal is a common side effect, not an approved use	11
Kisspeptin	Neuropeptide upstream of GnRH	Research studies; not an approved libido drug	2

What users report

#117 (a woman) says PT-141 'delivered exactly what it promised' for her and her fiancé, while BPC-157 and TB-500 did nothing. #67 describes PT-141 restoring desire and climax after a year of only partial help from tadalafil. #111 was 'obsessed with the libido bump' from Melanotan II but describes wrecked sleep. #109 describes strong erections from Melanotan II. #82 warns Melanotan II darkened moles and prompted a dermatology visit.

Low desire has many causes

Medications (including some antidepressants and GLP-1 drugs), relationship stress, sleep loss, low testosterone or oestrogen, depression and chronic illness all lower desire. A sudden change in libido deserves a medical conversation. Melanotan II is unregulated and has been linked to mole changes — new or changing moles need a clinician, not a forum protocol.

More confessions from the archive

Community Q&A

What peptides increase libido?: PT-141 (bremelanotide) is approved in the US for hypoactive sexual desire disorder in premenopausal women. Melanotan II often raises arousal as a side effect but is not approved. Kisspeptin is research-only.
Does PT-141 work for men and women?: The approved indication is for premenopausal women with HSDD. Anonymous reports here include both women (#117) and men (#67) describing stronger desire or arousal. That is not the same as an approved use in men.
Is Melanotan II safe for libido?: Melanotan II is not an approved medicine. Users report arousal (#109, #111) and also mole darkening (#82). Changing moles need medical review.
Does this page give dosing advice?: Peptide Confessions does not publish dosing, timing, injection or sourcing guidance.

Sources

Vyleesi (bremelanotide) prescribing information — DailyMed (NLM)

Anonymous first-hand reports plus sourced context — educational only, not medical advice. Editorial policy & corrections.