What people notice
Melanotan 2 effects may darken skin, dull hunger, or cause unwanted erections.
You can compare personal reports with the small studies and doctors' case reports.
What can arrive with a darker tan
A darker tan may be the first effect you hear about. Other users seek less hunger or stronger sexual interest. Men may also have erections they didn't plan. Some users say these changes began after their first Melanotan 2 dose.
Nausea may come with a hot red face, stretching, or yawning. Fresh moles may appear while older ones grow darker. Small human studies support the tanning and erection effects. Mouse tests found less eating, but that doesn't prove people will lose hunger. Doctors' reports describe harm to skin and organs.
Melanotan 2 isn't approved for use in people. Research-labelled online vials do not come with verified contents. The next section gives user stories, not tested proof.
What users say happened to them
These are personal stories posted by people who say they used this drug. This site didn't speak with them. No controlled study has tested their claims, so the stories aren't proof. No amount appears here.
Changes that users sought
- Skin that darkened with little sun. Many users say tanning drew them to the drug. They report seeing the change within days. They also report far less time in sunlight or on a sunbed.
- A smaller appetite and, at times, weight loss. Many place the hunger drop in the first hour. Some welcomed that effect, but others struggled to eat.
- Stronger sexual interest; erections for male users. Male users often place the start at the first or second dose. An erection may arrive hours later at an awkward time. Some welcomed it; others felt pain or shame. Women have described stronger arousal as well.
- More ease with their appearance. Some users say the tan kept them taking the drug despite harm. Others say thoughts about their looks began taking too much of their day.
Changes that can catch users off guard
- Nausea and, at times, vomiting. Many place the start in the first hour. It can feel worst during early days, then ease with time.
- A warm, red face. Users place the start anywhere from a few minutes to an hour. The warmth often passes soon.
- Stretching and yawning for no known reason. Both may follow a dose, according to users. Most call the changes strange but mild.
- A tired spell called "melanotan flu." Users describe feeling drained during early days. That worn-down feeling often fades.
- Moles and freckles that stand out. Users say the spots may darken ahead of nearby skin. You may then see each spot more clearly.
- Moles that were not there before. Some users say many appeared together. Others place their arrival within a day or two. A doctor visit often followed.
- More color on scars, genital skin, lips, or gums. Users also mention brown facial patches called melasma.
- Blotchy color with a slow fade. Some describe an orange or grey cast. After people stop, they say the color may linger for weeks or months.
- Tender areas around a needle mark. Reports mention redness, swelling, itching, bruises, and little lumps. Users tend to describe these marks as mild.
A darker tan doesn't prove that your skin can bear more sun. Burns are still described by people who stayed outside too long.
What the case reports warn you about
Doctors and published studies support each warning, and every number points to its source.
How moles may change and cancer may follow. The drug makes color-forming cells work throughout your skin. Doctors have reported sudden moles, odd shapes, and older moles turning darker [11][8][9][10]. Close skin checks found moles changing in color and appearance during use [4]. Other reports describe melanoma, a skin cancer, among users [12][13][14]. The reports give no cancer rate for you, and sun or sunbeds may add more risk. A fresh or changed mole needs a prompt skin check [15].
How damaged muscles may strain your kidneys. One case linked a Melanotan 2 shot with severe muscle breakdown. Damaged muscle can release matter that strains your kidneys [5]. Another report described kidney tissue cut off from blood [6]. Doctors still don't know how either harm began.
Priapism, an erection that stays and hurts. Several men needed care after melanotan shots. In one of those reports, the man had used an amount thought to be too large [16][17][18]. Quick care matters because trapped blood can harm the penis.
Brain swelling. One doctor reported brain swelling after melanotan use [19]. Warning signs include a headache, seizures, blurred vision, or a sharp rise in blood pressure.
Raised blood pressure and an upset stomach. Two mouse studies tested other drugs that set off related body signals, and blood pressure rose [20][21]. This animal finding doesn't show what Melanotan 2 does to human blood pressure. Human studies haven't settled that risk. In another test, researchers paired a new taste with the drug. The rats later avoided that taste [22]. That result suggests the drug felt unpleasant to them, but it can't predict what you will feel.
A vial with contents you can't confirm. Lab checks found online labels were false, drug amounts varied, and stray matter was present [23][24]. Surveys included goods sold under the melanotan name among fake or black-market shots [25][26]. They didn't show that every vial was tested. You can't confirm the drug, amount, cleanliness, or lack of germs.
No approval and no answers over many years. Melanotan 2 lacks approval from every drug agency [27]. Published work stops with small, early studies; no later study in a large group was completed. Skin doctors and drug agencies have warned against tanning goods containing the drug [28][29]. Research-labelled material remains on sale, alongside a clinical route in which a licensed prescriber can accept or refuse each case.
What melanotan 2 reddit and melanotan 2 reviews say
Posts found through melanotan 2 reddit and melanotan 2 reviews show two sides. Users praise a tan and stronger sex drive. They also mention nausea, red skin, and moles that changed or appeared. These accounts show what people noticed, but they don't predict your own result.
A 2021 study read posts from online groups. It found that users often heard too little about known risks. A 2025 study looked at sales pitches on social sites [30]. That study found sellers often left risks out. Personal stories don't prove safety, and human studies are still few and small.
What changed after the first studies
Scientists made the tanning drug during the late 1980s. Mac Hadley and Victor Hruby led the Arizona team behind it. They hoped a copy of the skin-color hormone could tan skin and guard it from sun harm [27]. Early work in people confirmed that skin grew darker [1].
An unplanned erection prompted scientists to run a small study of erection trouble. That finding led them to make a separate drug for sexual problems [3]. Melanotan 2 itself has no FDA approval. It never became licensed for tanning.
During the mid-2000s, sellers began offering unlicensed "melanotan" shots online. Sellers also used the name "Barbie drug." Skin doctors joined drug agencies in warning people about those shots [28][29]. Clinicians can consider compounded melanotan II for an individual prescription, but that product has no FDA approval.