Side-by-side · Research reference

DermorphinvsRetatrutide

Side-by-side comparison across mechanism, dosage, evidence, side effects, administration, and stack synergies. Citations on every claim where available.

AAnimal-StrongHUMAN-REVIEWED20/47 cited

BPhase 2HUMAN-REVIEWED10/41 cited

Dermorphin

Opioid Peptide · μ-Receptor Agonist · Research Only

~30×Morphine potency

μ-selectiveReceptor typeNegri 1992

D-Ala²Unique featureAmiche 1998

Research only · ICV / SC (animal models)

Retatrutide

Triple-receptor agonist · Phase 3

1–12 mgWeekly doseJastreboff 2023

24.2%Body-weight ↓Jastreboff 2023

~6 daysHalf-life (est)

SQ · Abdomen · Once weekly

01Mechanism of Action

Parameter

Dermorphin

Retatrutide

Primary target

μ-opioid receptors (central and peripheral)Negri 1992 Steel 2014

GLP-1R + GIPR + Glucagon receptor (triple agonism)Jastreboff 2023

Pathway

μ-receptor activation → G-protein coupling → adenylyl cyclase inhibition → neuronal hyperpolarization

Triple-receptor activation → ↑insulin (GLP-1+GIP), ↓gastric emptying, ↑lipid handling, ↑energy expenditure (glucagon component)Jastreboff 2023

Downstream effect

Potent analgesia, reduced nociceptive signaling, opioid-mediated CNS and peripheral effects

Maximal weight loss across class. Glucagon component drives lipolysis and energy expenditure beyond GLP-1+GIP aloneJastreboff 2023

Feedback intact?

N/A — exogenous opioid agonist

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Origin

Phyllomedusa sauvagei and P. bicolor frog skin — gene-encoded with natural D-amino acid incorporationAmiche 1998 Mignogna 1992

Synthetic peptide engineered for balanced affinity at three incretin / glucagon receptorsJastreboff 2023

Antibody development

Site-directed antibodies produced for detection and purificationCucumel 1996

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02Dosage Protocols

Parameter

Dermorphin

Retatrutide

Legal status

Controlled substance in many jurisdictions · Research only

Not approved for human use.

—

Animal research (ICV)

Low nanomolar to picomolar range

Intracerebroventricular administration in rodent models.

—

Detection limit (doping)

5 pg/mL in equine plasma/urineSteel 2014

High-throughput LC-MS/MS screen developed for racing industry.

—

Duration of action

10–120 minutes (dose-dependent, intrathecal)

—

Evidence basis

Animal studies · In vitro assays

Phase 2 trial; Phase 3 ongoingJastreboff 2023

Human toxicity

Kambô ritual (P. bicolor skin) — violent emesis, vasodilation, fluid shifts, ADH dysregulationTran 2025

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Standard dose

—

12 mg / week (max efficacy)Jastreboff 2023

Phase 2 trial dose. Phase 3 dosing TBD.

Frequency

—

Once weekly

Titration schedule

—

2 mg → 4 mg → 8 mg → 12 mg over 16 weeks

Duration

—

Indefinite for chronic indication (presumed)

Reconstitution

—

Investigational; not commercially available

Timing

—

Any time of day

Half-life

—

~6 days (estimated from class)

04Side Effects & Safety

Parameter

Dermorphin

Retatrutide

Opioid effects

Respiratory depression, sedation, euphoria, tolerance, dependence risk

—

CNS effects

Analgesia (high-affinity sites), catalepsy (low-affinity sites)Negri 1992

—

Kambô ritual toxicity

Violent emesis, vasodilation, profound fluid shifts, hyponatremia, ADH dysregulation, brain death (case report)Tran 2025

—

Peripheral effects

GI motility inhibition (ileum > vas deferens in vitro)Negri 1992

—

Receptor selectivity caveat

Two μ-receptor subtypes — differential behavioral effects (analgesia vs. catalepsy)Negri 1992

—

Proteolytic stability

Tyr³-Pro⁶ bond relatively unstable; endogenous enzymes may produce tetrapeptide fragmentsCucumel 1996

—

GI symptoms

—

Nausea, vomiting, diarrhea (very common, dose-dependent)Jastreboff 2023

Heart rate

—

↑ resting HR (3–7 bpm at 12 mg)Jastreboff 2023

Glucose handling

—

Glycemic improvement; rare hyperglycemia from glucagon component

Pancreatitis risk

—

Class warning

Thyroid C-cell tumours

—

Class warning (presumed)

Pregnancy / OB

—

Avoid (insufficient data)

Absolute Contraindications

Dermorphin

·Human use — not approved by any regulatory authority
·Controlled substance status — possession illegal in many jurisdictions
·Known opioid hypersensitivity or respiratory compromise

Retatrutide

·MTC personal or family history (presumed class effect)
·Pregnancy / breastfeeding

Relative Contraindications

Dermorphin

·Any context outside approved animal research protocols
·CNS depressant co-administration

Retatrutide

·Severe gastroparesis
·History of pancreatitis
·Severe cardiovascular disease (HR signal)

05Administration Protocol

Parameter

Dermorphin

Retatrutide

1. Legal and ethical framework

Dermorphin is a controlled substance in many jurisdictions and is not approved for human use. Possession, synthesis, or distribution may be illegal. Use is restricted to licensed research settings under institutional review.

Investigational peptide. Research vials reconstituted with bacteriostatic water per label.

2. Animal research protocols

In rodent models, intracerebroventricular (ICV) or intrathecal injection is used at nanomolar to picomolar concentrations. Subcutaneous administration also documented. All protocols require IACUC approval.

SQ — abdomen, thigh, or upper arm. Rotate weekly.

3. Analytical detection

High-throughput LC-MS/MS screens developed for anti-doping programs detect dermorphin and 17 related peptides in equine and human urine/plasma at limits as low as 5 pg/mL.Steel 2014

Once weekly, same day.

4. Kambô ritual (traditional use)

Application of Phyllomedusa bicolor skin secretions to superficial burns. Not recommended — associated with severe toxicity including violent emesis, hyponatremia, and documented case of brain death.Tran 2025

Refrigerate 2–8 °C. Light-protected.

5. Needle

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27–31G, 4–8 mm insulin syringe.