CBD vs Prescribed Cannabis
Three things get blurred constantly: the CBD on a shop shelf, the one licensed medicine made from it, and the prescribed cannabis medicines a specialist can give you. Here's how they actually differ.
Because the word "CBD" turns up in all three, people assume a £15 high-street oil is somehow the same thing as a medicine a doctor prescribes. It isn't. Three quite different things share the name, and telling them apart is the single most useful thing to understand about the whole market.
1. Shelf CBD, a wellness product
This is what most of this section is about: the oils, gummies and drinks you can buy without a prescription. It's regulated as food, not medicine, so by law it can't make health claims, the dose is usually modest, and as the quality problem shows, you can't always trust the label. Treat it as an unproven wellness item you're free to try, not as treatment.
2. Epidyolex, a licensed CBD medicine
There is exactly one CBD product that has been through full clinical trials and licensed as a medicine in the UK: Epidyolex, a purified, high-strength CBD used for seizures in rare, severe epilepsies. It's the same molecule as the shelf oil, but at a controlled dose, made to pharmaceutical standard, and prescribed and monitored by a specialist. Its existence is exactly why the wellness market can't claim CBD "does nothing," but also why a supermarket gummy isn't a substitute for a proven medicine.
3. Prescribed medical cannabis, a specialist route
Separately again, since 2018 specialist doctors in the UK have been able to prescribe unlicensed cannabis-based products for medicinal use (CBPMs), which can contain THC as well as CBD, for a small set of conditions when standard treatments haven't worked. This is a doctor-led, tightly-controlled route, largely private in practice, and a world away from buying CBD online. The full picture, who qualifies, what it costs, why access is so limited, is on the Medical cannabis page.
So: one unregulated wellness product, one licensed medicine, and one specialist prescription, all wearing the same three letters. If your interest in CBD is really about treating a health condition, the honest answer is that the shelf product isn't the tool for that, and the conversation belongs with a doctor and the Medical cannabis page.