Drug & supplement interaction

Melanotan + Loperamide, Simethicone

Loperamide, Simethicone brand name: Imodium Advanced.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Melanotan and Loperamide, Simethicone in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the label for Loperamide, Simethicone states a food rule worth keeping to.

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Interaction report

Melanotan and Loperamide, Simethicone

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Loperamide, Simethicone and Melanotan in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

Worth understanding: our licensed dataset holds no drug-interaction record for Melanotan at all — not against Loperamide, Simethicone, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Melanotan safety at a glance

Melanotan overall Avoid Melanotan is an unapproved, unregulated injectable peptide with real safety risks and no quality control.
Pregnancy Avoid There is no safety data; avoid use during pregnancy.
Breastfeeding Avoid There is no safety data; avoid use while breastfeeding.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Loperamide, Simethicone and Melanotan? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Melanotan Itself Has Been Linked To

This is not an interaction — nothing below involves Loperamide, Simethicone. It is the side-effect record for Melanotan on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Melanotan, this list is the first place to look. 2 entries are worth acting on rather than waiting out — marked below.

  • Severe muscle breakdown / Seizures Worth acting on Additional detail

    “Subcutaneously, melanotan can cause gastrointestinal cramping, nausea, decreased appetite, facial flushing, fatigue, somnolence, dizziness, yawning, stretching, and spontaneous penile erections. It can also cause increased pigmentation of the face, upper body, and buttocks.”

    Melanotan · Natural Medicines adverse-effect record, reported in anxiety.

    6 sources cited
    1. 5685. Dorr RT, Lines R, Levine N, et al. Evaluation of melanotan-II, a superpotent cyclic melanotropic peptide in a pilot phase-I clinical study. Life Sci 1996;58:1777-84. PubMed
    2. 5687. Wessells H, Fuciarelli K, Hansen J, et al. Synthetic melanotropic peptide initiates erections in men with psychogenic erectile dysfunction; double-blind, placebo controlled crossover study. J Urol 1998;160:389-93. DOI
    3. 5688. Wessells H, Gralnek DR, Dorr RT, et al. Erectogenic properties of melanotan II in men with organic erectile dysfunction. 1999. Abstract Info-American Urological Association, Inc. DOI
    4. 99190. Wessells H, Gralnek D, Dorr R, Hruby VJ, Hadley ME, Levine N. Effect of an alpha-melanocyte stimulating hormone analog on penile erection and sexual desire in men with organic erectile dysfunction. Urology. 2000;56(4):641-6. PubMed
    5. 106742. Mallory CW, Lopategui DM, Cordon BH. Melanotan tanning injection: a rare cause of priapism. Sex Med. 2021 Feb;9(1):100298. PubMed
    6. 99176. Hjuler KF, Lorentzen HF. Melanoma associated with the use of melanotan-II. Dermatology. 2014;228(1):34-6. PubMed

    “Melanotan can cause fatigue and somnolence, as well as yawning and stretching.

    There is a case report of posterior reversible encephalopathy syndrome (PRES) occurring in a 20-year-old female who had a single seizure following use of subcutaneous melanotan daily for 1 week. The seizure resulted in reduced sensation on one side and reduced concentration and word-finding ability.”

    Melanotan · Natural Medicines adverse-effect record, reported in epilepsy.

    6 sources cited
    1. 5685. Dorr RT, Lines R, Levine N, et al. Evaluation of melanotan-II, a superpotent cyclic melanotropic peptide in a pilot phase-I clinical study. Life Sci 1996;58:1777-84. PubMed
    2. 5687. Wessells H, Fuciarelli K, Hansen J, et al. Synthetic melanotropic peptide initiates erections in men with psychogenic erectile dysfunction; double-blind, placebo controlled crossover study. J Urol 1998;160:389-93. DOI
    3. 5688. Wessells H, Gralnek DR, Dorr RT, et al. Erectogenic properties of melanotan II in men with organic erectile dysfunction. 1999. Abstract Info-American Urological Association, Inc. DOI
    4. 99190. Wessells H, Gralnek D, Dorr R, Hruby VJ, Hadley ME, Levine N. Effect of an alpha-melanocyte stimulating hormone analog on penile erection and sexual desire in men with organic erectile dysfunction. Urology. 2000;56(4):641-6. PubMed
    5. 99179. Kaski D, Stafford N, Mehta A, Jenkins IH, Malhotra P. Melanotan and the posterior reversible encephalopathy syndrome. Ann Intern Med. 2013;158(9):707-8. PubMed
    6. 99183. Nelson ME, Bryant SM, Aks SE. Melanotan II injection resulting in systemic toxicity and rhabdomyolysis. Clin Toxicol (Phila). 2012;50(10):1169-73. PubMed
  • Kidney problems / Raised blood pressure Worth acting on Additional detail

    Recorded for Melanotan in the same Natural Medicines adverse-effect record shown under Severe muscle breakdown / Seizures above.

  • Erection problems Additional detail

    “Subcutaneously, melanotan-II can cause spontaneous penile erections and priapism. In two case reports, males aged 41 and 55 using subcutaneous melanotan-II for tanning developed ischemic priapism lasting 22 hours and 30 hours, respectively. In one case the dose was unknown, and in the other it was 2 mg.”

    Melanotan · Natural Medicines adverse-effect record, reported in erectile dysfunction (ed).

    5 sources cited
    1. 5685. Dorr RT, Lines R, Levine N, et al. Evaluation of melanotan-II, a superpotent cyclic melanotropic peptide in a pilot phase-I clinical study. Life Sci 1996;58:1777-84. PubMed
    2. 5687. Wessells H, Fuciarelli K, Hansen J, et al. Synthetic melanotropic peptide initiates erections in men with psychogenic erectile dysfunction; double-blind, placebo controlled crossover study. J Urol 1998;160:389-93. DOI
    3. 5688. Wessells H, Gralnek DR, Dorr RT, et al. Erectogenic properties of melanotan II in men with organic erectile dysfunction. 1999. Abstract Info-American Urological Association, Inc. DOI
    4. 106742. Mallory CW, Lopategui DM, Cordon BH. Melanotan tanning injection: a rare cause of priapism. Sex Med. 2021 Feb;9(1):100298. PubMed
    5. 106744. Dreyer BA, Amer T, Fraser M. Melanotan-induced priapism: a hard-earned tan. BMJ Case Rep 2019;12(2):e227644. PubMed
  • Flushing Additional detail

    “Subcutaneously, melanotan can cause facial flushing. It can also cause increased pigmentation of the face, upper body, and buttocks. In case reports of individuals with light skin and a history of use of tanning beds, the eruption of new nevi, and darkening of existing nevi or change to dysplastic nevi, were thought to be related to the use of subcutaneous melanotan.”

    Melanotan · Natural Medicines adverse-effect record, reported in actinic keratoses.

    6 sources cited
    1. 5685. Dorr RT, Lines R, Levine N, et al. Evaluation of melanotan-II, a superpotent cyclic melanotropic peptide in a pilot phase-I clinical study. Life Sci 1996;58:1777-84. PubMed
    2. 5688. Wessells H, Gralnek DR, Dorr RT, et al. Erectogenic properties of melanotan II in men with organic erectile dysfunction. 1999. Abstract Info-American Urological Association, Inc. DOI
    3. 99190. Wessells H, Gralnek D, Dorr R, Hruby VJ, Hadley ME, Levine N. Effect of an alpha-melanocyte stimulating hormone analog on penile erection and sexual desire in men with organic erectile dysfunction. Urology. 2000;56(4):641-6. PubMed
    4. 99177. Schulze F, Erdmann H, Hardkop LH, et al. Eruptive naevi and darkening of pre-existing naevi 24 h after a single mono-dose injection of melanotan II. Eur J Dermatol. 2014;24(1):107-9. PubMed
    5. 99178. Reid C, Fitzgerald T, Fabre A, Kirby B. Atypical melanocytic naevi following melanotan injection. Ir Med J. 2013;106(5):148-9.
    6. 99188. Cousen P, Colver G, Helbling I. Eruptive melanocytic naevi following melanotan injection. Br J Dermatol. 2009;161(3):707-8. PubMed
  • Sweating / A fast or pounding heartbeat / Drowsiness Additional detail

    Recorded for Melanotan in the same Natural Medicines adverse-effect record shown under Severe muscle breakdown / Seizures above.

  • Anxiety or restlessness Additional detail

    Recorded for Melanotan in the same Natural Medicines adverse-effect record shown under Severe muscle breakdown / Seizures above.

Showing the 10 most notable of 15 recorded effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

Everything above comes from the Natural Medicines adverse-effect record for Melanotan — expand a row for the licensed statement it rests on. We haven’t matched Loperamide, Simethicone to its FDA label in our system yet, so we can’t compare its own side-effect list here — the leaflet that comes with your prescription is the authoritative list for Loperamide, Simethicone.

How to take them

Some Loperamide, Simethicone Products Have a Food Rule — Melanotan Should Not Break It

At least one FDA label for a product containing Loperamide, Simethicone says to take it on an empty stomach. Most supplements — Melanotan included — are taken with a meal, so the easy mistake is swallowing both together at breakfast. Where that rule applies, keep Loperamide, Simethicone on its own and move Melanotan to a meal later in the day.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Loperamide, Simethicone products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

Directions drink plenty of clear fluids to help prevent dehydration caused by diarrhea take only on an empty stomach (1 hour before or 2 hours after a meal) take with a full (8 oz.) glass of water find right dose on chart below.

From the Dosage and Administration section of the FDA label we read for Loperamide, Simethicone — where that label names a specific product, the instruction is that product's.

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

Everything else you take

See Every Supplement That Interacts With Loperamide, Simethicone

This page covers Melanotan only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Loperamide, Simethicone page lists 82 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Henbane (major), Scopolia (major), St. John's Wort (major) and Angel's Trumpet (moderate).

By severity: 4 major · 59 moderate · 19 minor.

From our pharmacist’s overview on the Loperamide, Simethicone page

“Imodium Advanced combines loperamide, an anti-diarrheal opioid that normally stays out of the brain thanks to a transporter called P-glycoprotein, with simethicone for gas, and I treat its interaction list with more respect than most over-the-counter medicines warrant. Thirty-seven of the 82 interacting ingredients on file affect that…”

Reviewed by 2 · Jul 18, 2026

Open the Loperamide, Simethicone interaction page

How much people look this up

Where Melanotan and Loperamide, Simethicone Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Melanotan
Steady interest

#944 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Loperamide, Simethicone
Top 25%

#331 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Melanotan reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Melanotan and Loperamide, Simethicone records this page draws on were last updated July 10, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Melanotan

What is Melanotan?

  • Skin tanning
  • Reducing sun exposure for tanning
  • Erectile dysfunction (Melanotan II)
  • Appetite or body composition (unproven)

Melanotan is a lab-made synthetic peptide (not an herb) marketed online to darken the skin and, in one form, to aid erections. It is not approved or regulated as a supplement, its purity and dosing are unreliable, and it has been linked to serious safety concerns, so we do not recommend using it.

Synthetic peptide (laboratory-made) · Injectable solution, nasal spray (sold illicitly online)

An interaction check asks whether these two react with each other — it does not ask whether Melanotan is a good idea for someone in your situation. Here is what our Melanotan record says about it on its own.

Melanotan: dosing

There is no established, safe, or standardized dose for Melanotan, and no health authority recommends its use as a supplement. The products sold online do not have reliable dosing instructions, and the actual amount of peptide in a vial can vary widely.Because of the safety concerns and lack of regulation, we do not provide dosing guidance for Melanotan.

From our Melanotan monograph — the full record covers uses, side effects and every documented interaction.

Read the full Melanotan monograph & all interactions
Keep checking

Other Drugs & Melanotan

Browse every other medication we’ve checked against Melanotan — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

We also checked Melanotan against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Melanotan list.

See the full Melanotan interactions page
See every supplement checked against Loperamide, Simethicone, ranked by severity
Evidence & sources

Melanotan References

The 17 references that drive our Melanotan monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Dorr RT, Lines R, Levine N, et al. Evaluation of melanotan-II, a superpotent cyclic melanotropic peptide in a pilot phase-I clinical study. Life Sci 1996;58:1777-84. PubMed
  2. Wessells H, Fuciarelli K, Hansen J, et al. Synthetic melanotropic peptide initiates erections in men with psychogenic erectile dysfunction; double-blind, placebo controlled crossover study. J Urol 1998;160:389-93. DOI
  3. Wessells H, Gralnek DR, Dorr RT, et al. Erectogenic properties of melanotan II in men with organic erectile dysfunction. 1999. Abstract Info-American Urological Association, Inc. DOI
  4. Hjuler KF, Lorentzen HF. Melanoma associated with the use of melanotan-II. Dermatology. 2014;228(1):34-6. PubMed
  5. Schulze F, Erdmann H, Hardkop LH, et al. Eruptive naevi and darkening of pre-existing naevi 24 h after a single mono-dose injection of melanotan II. Eur J Dermatol. 2014;24(1):107-9. PubMed
  6. Reid C, Fitzgerald T, Fabre A, Kirby B. Atypical melanocytic naevi following melanotan injection. Ir Med J. 2013;106(5):148-9.
  7. Kaski D, Stafford N, Mehta A, Jenkins IH, Malhotra P. Melanotan and the posterior reversible encephalopathy syndrome. Ann Intern Med. 2013;158(9):707-8. PubMed
  8. Nelson ME, Bryant SM, Aks SE. Melanotan II injection resulting in systemic toxicity and rhabdomyolysis. Clin Toxicol (Phila). 2012;50(10):1169-73. PubMed
  9. Ong S, Bowling J. Melanotan-associated melanoma in situ. Australas J Dermatol. 2012;53(4):301-2.
  10. Paurobally D, El Hayderi L, Richert B, Andre J, Nikkels AF. Melanotan-associated transverse melanonychia. J Eur Acad Dermatol Venereol. 2013;27(1):128-9. PubMed
  11. Ferrándiz-Pulido C, Fernández-Figueras MT, Quer A, Ferrándiz C. An eruptive pigmented lesion after melanotan injection. Clin Exp Dermatol. 2011;36(7):801-2. PubMed
  12. Paurobally D, Jason F, Dezfoulian B, Nikkels AF. Melanotan-associated melanoma. Br J Dermatol. 2011;164(6):1403-5. PubMed
  13. Cousen P, Colver G, Helbling I. Eruptive melanocytic naevi following melanotan injection. Br J Dermatol. 2009;161(3):707-8. PubMed
  14. Langan EA, Ramlogan D, Jamieson LA, Rhodes LE. Change in moles linked to use of unlicensed "sun tan jab". BMJ. 2009;338:b277. PubMed
  15. Wessells H, Gralnek D, Dorr R, Hruby VJ, Hadley ME, Levine N. Effect of an alpha-melanocyte stimulating hormone analog on penile erection and sexual desire in men with organic erectile dysfunction. Urology. 2000;56(4):641-6. PubMed

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Melanotan and Loperamide, Simethicone Together: Common Questions

Is it safe to take Melanotan with Loperamide, Simethicone?
We do not list a known interaction between Melanotan and Loperamide, Simethicone. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Should I take Melanotan and Loperamide, Simethicone at the same time of day?
At least one FDA label for a product containing Loperamide, Simethicone says to take it on an empty stomach, and supplements are usually taken with a meal — so taking them together at breakfast is the easy mistake. Where that applies, keep Loperamide, Simethicone on its own and move Melanotan to a meal later in the day. Food instructions belong to the product rather than the ingredient, so check the directions on your own box. This is about absorption, not an interaction.
Does Loperamide, Simethicone interact with any supplements?
Yes. Loperamide, Simethicone has documented interactions with 82 supplements in our database — Melanotan is not one of them. The Loperamide, Simethicone interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

Keep Exploring

Melanotan monograph Uses, safety profile, and every drug interaction in one place Loperamide, Simethicone supplement interactions Every supplement checked against Loperamide, Simethicone, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 17 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Loperamide, Simethicone and Melanotan?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.