Description
Eight adhesive CBD patches to a box, 20 mg of cannabidiol isolate in each, 160 mg across the set. Each patch measures 1.5 by 2 inches and the adhesive holds through a shower, which is the main thing people want to know and the main thing patch listings leave out. The matrix is isolate in an adhesive layer rather than a reservoir, so there is nothing in one to leak.
What is in a box of CBD patches
A fixed amount per unit, a stated patch size and a named adhesive type. There is no gel, no backing liquid and no dose to measure.
- CBD patches: 20 mg of cannabidiol isolate per patch
- Count: 8 patches. Box total: 160 mg
- Size: 1.5 by 2 inches. Construction: adhesive matrix, not a reservoir
- Spectrum: isolate, THC non detect on the certificate
- Water resistance: stays on through a shower
- Price: $25 a box, with the price per milligram printed under it
What cbd patches are, and what they are not
It is a way of holding a fixed amount of something against skin for a long period. Whether any of it crosses into blood, and how much, is a question about the formulation and the skin it is on, and we are not going to put a number on it. CBD patches are often sold with transdermal language borrowed from pharmaceutical patches, which deliver drugs engineered specifically for that route with permeation enhancers chosen to match. The topical range states concentration and total milligrams on every listing and leaves the absorption question where the evidence leaves it.
Cost per milligram, stated plainly
Twenty five dollars for 160 mg is around sixteen cents a milligram, which makes this the most expensive cannabidiol in the catalogue by that measure. The reason is manufacturing: an adhesive matrix laminate is a converting operation, not a mixing one. We print the figure under the price regardless, including on the items where it makes us look expensive, and the argument for doing so is in why price per milligram beats the price on the bottle.
Eight patches, and how long one stays on
The adhesive is rated for a full day and holds through a shower, which is the practical specification and the one that decides whether a box is usable. Hair makes removal uncomfortable and a damp patch applied to damp skin will lift at an edge within an hour, so clean dry skin matters more than placement. CBD patches do not come off cleanly if you leave one on for three days, and nothing is gained by trying. Eight patches at one a day is just over a week, which is why the box is sized the way it is rather than as a month’s supply.
Testing
Every lot of CBD patches is assayed by an independent laboratory for cannabinoid content per patch, heavy metals, pesticides and microbials. Per unit assay rather than a batch average is the figure that matters on a laminated product, because coat weight varies across a web and that variation is what a per patch number captures. Lots under their printed milligrams are withdrawn from sale and their certificates stay on the public results page alongside the ones that passed.
What the published transdermal work covers
Animal models, mostly. The frequently cited work on transdermal cannabidiol used gels applied to rats at stated milligram per day doses, and the small human literature describes gels and creams rather than adhesive patches. Pharmaceutical transdermal systems are designed around molecules with suitable size and solubility, and cannabidiol is lipophilic and poorly soluble in water, which is a chemistry statement rather than a verdict. Those sentences describe the state of the literature, not these patches, and a plain summary of what has been studied in cannabinoids is kept by the National Center for Complementary and Integrative Health.
External use only. Put a patch on clean dry skin, patch test a small area first if adhesives are a problem for you, and take it off if the skin underneath objects. The certificate for the box of CBD patches currently shipping is linked here and filed by lot number.
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