Regarding the Mechanisms of Promiscuous Cannabinoid Pharmacology: An Elephant Has Entered the Room.

Decades of research have discovered a broad variety of interesting in vitro activities resulting from cannabinoid exposure. Recent investigations of cannabidiol, however, present a potential explanation for these findings, which relies on the nonspecific effects of colloidal dispersions as opposed to those of specific drug interactions with macromolecular targets. This perspective raises the question of how false-positive assay results arising from such colloidal interference may permeate the field of cannabinoid pharmacology. It further suggests a direction for future research with the intent of identifying true pharmacological interactions that might be more efficiently developed into therapeutic targets.