Topical

A topical is a cannabis-infused product applied to intact skin for localized effect — lotions, balms, salves, creams, oils, and sprays formulated to engage the skin's endocannabinoid system without producing systemic cannabinoid exposure. Human skin expresses functional cannabinoid signaling: CB1 receptors are found in keratinocytes, sensory nerve endings, hair follicles, and differentiated sebocytes; CB2 receptors dominate in basal sebocytes and cutaneous immune cells; and secondary targets include TRPV1, PPARγ, and adenosine A2A receptors. Cannabis topicals aim to modulate pain, inflammation, itch, sebum production, and keratinocyte turnover through these local pathways.

⚠️ The common claim that topicals "cannot cause a high" is generally accurate but not absolute. The stratum corneum is an effective barrier to highly lipophilic molecules, and standard topicals do not deliver cannabinoids to systemic circulation in pharmacologically meaningful amounts. Exceptions arise with products that include permeation enhancers, occlusive patch constructions, application to broken or inflamed skin, or very large-surface dosing. Human trials of topical cannabinoids are limited but growing, primarily in arthritis, neuropathy, and dermatologic conditions. Onset of localized effect is reported at 10–60 minutes with duration of 2–4 hours, though variability is high. → See also: Lotion, Balm, Patch, Transdermal, onset (Part 5).

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