Dermorphin: Reference Overview and Reconstitution Notes

Dermorphin

What it is

Dermorphin is a naturally occurring opioid heptapeptide (a chain of seven amino acids) first isolated from the skin of South American frogs of the genus Phyllomedusa, with the sequence Tyr-D-Ala-Phe-Gly-Tyr-Pro-Ser-NH2. It is notable for containing a D-amino acid residue (D-alanine at position 2), which was unusual among vertebrate peptides and contributes to its resistance to enzymatic breakdown.

Research context and categorization

Dermorphin falls under the analgesic and opioid-receptor pharmacology category of research peptides. It is characterized in the literature as a high-affinity, highly selective agonist at the mu-opioid receptor, and sources frequently note that it is many times more potent than morphine at that receptor in laboratory assays. In research settings it is commonly discussed in relation to antinociception (pain-signaling) studies, mu-opioid receptor binding and selectivity characterization, and as a tool compound for probing opioid receptor subtypes and associated behavioral effects such as catalepsy in animal models. These uses are investigational. Dermorphin is not an approved therapy, and any effects described in the literature are the subject of study rather than confirmed or approved outcomes.

Status

  • Regulatory status: Research-only, not FDA-approved for any human indication; described in the literature as remaining under investigation.
  • Sport status: Prohibited under the WADA Prohibited List. It is treated as an in-competition prohibited narcotic under the S7 Narcotics class. It has also drawn attention in equine sport, where it appeared on racing-authority prohibited-substance lists in the so-called "frog juice" cases.

Reconstitution notes (general)

Dermorphin is typically supplied as a lyophilized (freeze-dried) powder that is reconstituted before use. The working concentration follows a simple relationship: concentration equals the milligrams of peptide in the vial divided by the millilitres of bacteriostatic water added. For example, a 5 mg vial brought up with 2.5 mL of bacteriostatic water yields 2 mg/mL. You can work out volumes and target concentrations with the calculator at our reconstitution and blend calculators.

Dilution and handling notes (compound-specific)

The key handling fact for dermorphin is its limited aqueous solubility. It dissolves in water only to roughly 2 mg/mL, so aqueous preparations are usually kept at or below that level; bringing the powder up much above that ceiling tends to leave undissolved material, cloudiness, or a hazy suspension rather than a clear solution, and the practical fix is simply to add more diluent to bring the target concentration back within the soluble range. Research vials are commonly packaged as about 2 mg to 5 mg of solid, frequently as the trifluoroacetate (TFA) salt supplied under inert gas; the salt form generally helps the peptide enter aqueous solution more readily. Because it is active at very low concentrations in assays, preparing a defined stock and then making serial dilutions is generally more reliable than weighing out extremely small amounts directly, and some non-aqueous research workflows use a compatible organic solvent such as DMSO for a higher-concentration stock. When reconstituting in water, direct the stream against the vial wall and swirl gently rather than shaking, since vigorous agitation can foam or stress the peptide. Two further quirks matter: the powder is hygroscopic, so it draws moisture from the air and should be handled quickly and resealed promptly, and it is light-sensitive, so protect it from light during handling and storage. Storing reconstituted solution in glass rather than plastic helps limit adsorption losses.

Handling and storage

Store reconstituted solution refrigerated at 2 to 8 C, kept out of direct light. Wipe the vial stopper with an alcohol swab before drawing, and label the vial with the mix date. A refrigerated reconstituted solution is generally considered usable for roughly a 4-week window. Discard the solution if it becomes cloudy or discolored or shows floating particles. For long-term storage of unreconstituted powder, keep it frozen and sealed against moisture.

Related reading

Tools and supplies

For laboratory and research reference only. Educational content, not medical, dosing, injection, or therapeutic guidance, and not intended for human or animal use. Any research uses described are investigational and not confirmed or approved benefits. Confirm anything involving health with a licensed professional. References linked above.