The Phyllomedusa bicolour skin secretion contains a very high number of bioactive peptides (short chains of amino acids that can bind to cell receptors in human cells and trigger a reaction in the body) responsible for the physiological effects. Some studies have undertaken several methods of extraction to determine the chemical makeup of kambô and to test the effects of each peptide that is present in large amounts.
Phyllocaerulein is present in the highest concentration and seems to be responsible for kambô’s principal effects. It has a strong effect on the gastrointestinal smooth muscle, stimulating its motility, bile flow, pancreatic and gastric secretions, and mediates analgesic effects in the central nervous system.
Phillokinin has hypotensive effects on the cardiovascular system.
Phyllomedusin has also strong hypotensive effects and stimulates gut motility (contributing to purging), and lacrimal, and salivary secretions.
Sauvagine causes a fall in blood pressure due to vasodilatation of the mesenteric vascular area and provokes intense tachycardia. The central nervous system seems to activate the pituitary-adrenal axis, increasing levels of corticosterone, catecholamines (such as adrenaline) and glucose in plasma.
Opioid peptides. Ala-dystrophin and lys7-diamorphine have a strong affinity for opioid receptors, surpassing that of morphine. This is one of the reasons the effect of the venom has been generally attributed to these substances. However, the amounts present in kambô are so limited that they seem to have no significant biological activity in humans.
Peptides from the dermaseptin family have been detected in reduced amounts. These are described to inhibit the growth of a broad spectrum of microorganisms (protozoa, fungi, bacteria and viruses) without harming differentiated mammalian cells, thus being responsible for a potential antibiotic activity.
As previously mentioned, the dosage is measured by the number of dots applied, each dot contains approximately 10 mg of skin secretion with a rough measure of 5 mm in diameter (the size of a green pea). The dose of choice will depend on body size, experience, reasons for application, or the practitioner’s tradition.
- Low dose: 1 to 3 dots
- Average dose: 3 to 10 dots
- High dose: More than 10 dots
Matses indigenous people from the southwestern Amazon have traditionally used the kambô application as additional support for hunting practices. They self-apply up to 20 to 30 mg twice daily.
Some traditional practitioners may reach 100 dots in a single application, yet this dose is limited to cultural rituals and experienced users. It would be dangerous for an inexperienced user to apply a very high dose.