Setmelanotide

What it is claimed to help

These are the uses attached to Setmelanotide in research, clinical practice, or marketing. Listing a claim is not endorsing it — tap any of them to see every other compound carrying the same claim.

What the human evidence actually is

Pivotal trials in POMC and LEPR deficiency and in Bardet-Biedl syndrome showed substantial weight and hunger reduction. Approval is narrow and genetics-gated: it is not a general obesity drug and does not work like one.

How it is supposed to work

Restores signalling through the MC4 receptor in the hypothalamic melanocortin pathway, which is broken in these specific genetic conditions.

Safety

Skin hyperpigmentation, injection site reactions, nausea, spontaneous penile erections, depression and suicidal ideation have been reported.

Storage and handling

Lyophilised peptide is generally stored at 2–8 °C, or below −20 °C for long-term storage. Reconstituted in bacteriostatic water (0.9% benzyl alcohol) a solution is typically treated as usable for about 28 days refrigerated, versus roughly 24 hours for plain sterile water, which has no preservative. Add the water slowly down the vial wall and swirl — never shake, which shears peptide chains and foams the solution.