The immediate and powerful effects of THC are explained because of the special affinity it has with the CB1 type receptors, which mediate crucial processes in the brain. The less prominent (but no less important) action of CBD was explained, at least for a while, by hypothesizing that it binds to CB2 type receptors, hence its more diffuse manner of exercising changes in the body. Early on, the antipsychotic effects of cannabidiol were observed, an aspect which seemed to be in consonance with this initial hypothesis.
Current studies, including one carried out by the UC San Diego School of Medicine, are looking into how the endocannabinoid system may be linked to reducing symptoms associated with autism. This is due to its role in social reward responsivity, neural development and circadian rhythm and anxiety regulation – all of which are often affected by autism. (52)
Currently, the only CBD product approved by the Food and Drug Administration is a prescription oil called Epidiolex. It's approved to treat two types of epilepsy. Aside from Epidiolex, state laws on the use of CBD vary. While CBD is being studied as a treatment for a wide range of conditions, including Parkinson's disease, schizophrenia, diabetes, multiple sclerosis and anxiety, research supporting the drug's benefits is still limited.
There has been a fair amount of confusion surrounding the legality of CBD oil. But while the vast majority of cannabinoids are controlled substances under the Misuse of Drugs Act, rest assured that CBD oil is legal across the UK for medicinal purposes, provided it has been derived from an industrial hemp strain that is EU-approved. These strains contain very little to no THC (the psychoactive cannabinoid).
CBD may be sold in oils or tinctures. Tinctures are normally sold in small dropper bottles. You can drop a couple of drops of the tincture underneath your tongue, which allows the liquid to be absorbed directly into your bloodstream. This makes tinctures more potent than ingesting this phytocannabinoid in a different way because the drops do not have to go through the process of digestion before they enter your bloodstream.
Scott Shannon, MD, assistant clinical professor at the University of Colorado, recently sifted through patient charts from his four-doctor practice to document CBD’s effects on anxiety. His study, as yet unpublished, found “a fairly rapid decrease in anxiety scores that appears to persist for months,” he says. But he says he can’t discount a placebo effect, especially since “there’s a lot of hype right now.”
Tinctures: Tinctures are another popular way to use CBD, likely because you can easily gauge exactly how much cannabidiol you are ingesting, like CBD oil. A tincture is usually extracted with alcohol or another solvent. With a tincture, you use a dropper and place the drops in the mouth. Sometimes, manufacturers will use carrier oils, natural flavors or fatty oils in their tinctures.
It makes no sense to me that something that helps with anxiety has an irritability side effect – as a lot of my anxiety is co-mingled naturally with irritability. Further, I have noticed none of these side effects, given that if you become fatigued or sleepy, you adjust dose the next day. So I don’t call that a side effect – rather – an effect of taking too much.