Marijuana itself can have a number of short-term and long-term adverse effects, including impaired short-term memory, altered judgment, and impaired coordination. Research also suggests that marijuana can alter brain development and may lead to cognitive impairment.
It is also important to remember that CBD and THC work in a number of different areas of the brain and researchers do not yet fully understand the effects that these cannabinoids have, either alone or in conjunction with one another.
CBD and THC have the same molecular structure, but there are differences in how these molecules are arranged that are responsible for the differing effects they have. By mimicking endocannabinoids, they bind with receptors and cause different effects in the body.
This interest is likely to continue to grow as cannabis and marijuana products become legal in more states. A number of different products have emerged that contain CBD, THC, or both that are designed to alleviate ailments such as stress, anxiety, and insomnia. In order to understand the side effects and potential benefits of these products, it is important to first understand the differences between CBD and THC.
NIDA also notes that THC alters how the hippocampus and orbitofrontal cortex function. These areas of the brain are important in the formation of new memories and the ability to shift attention from one thing to the next. This not only affects a person’s ability to learn and form new memories, but it also makes it difficult for people to perform difficult tasks.
Kendra Cherry, MS, is an author and educational consultant focused on helping students learn about psychology.
Delta-9-tetrahydrocannabinol, or THC, is the main psychoactive ingredient in cannabis. According to the National Institute on Drug Abuse (NIDA), THC activates the brain's reward system by signaling the release of the brain chemical dopamine. Dopamine is a neurotransmitter that plays an important role in mood and pleasure. By triggering a higher-than-normal release of dopamine, THC causes people to experience feelings of euphoria. THC is often administered by smoking marijuana, but it can also be found as an ingredient in capsules, edibles, and oils.
CBD has been touted for a wide variety of health issues, but the strongest scientific evidence is for its effectiveness in treating some of the cruelest childhood epilepsy syndromes, such as Dravet syndrome and Lennox-Gastaut syndrome (LGS), which typically don’t respond to antiseizure medications. In numerous studies, CBD was able to reduce the number of seizures, and, in some cases, stop them altogether. Epidiolex, which contains CBD, is the first cannabis-derived medicine approved by the FDA for these conditions.
CBD is readily obtainable in most parts of the United States, though its exact legal status has been in flux. All 50 states have laws legalizing CBD with varying degrees of restriction. In December 2015, the FDA eased the regulatory requirements to allow researchers to conduct CBD trials. In 2018, the Farm Bill made hemp legal in the United States, making it virtually impossible to keep CBD illegal – that would be like making oranges legal, but keeping orange juice illegal.
The evidence for cannabidiol health benefits
Outside of the US, the prescription drug Sativex, which uses CBD as an active ingredient, is approved for muscle spasticity associated with multiple sclerosis and for cancer pain. Within the US, Epidiolex is approved for certain types of epilepsy and tuberous sclerosis.
The Farm Bill removed all hemp-derived products, including CBD, from the Controlled Substances Act, which criminalizes the possession of drugs. In essence, this means that CBD is legal if it comes from hemp, but not if it comes from cannabis (marijuana) – even though it is the exact same molecule. Currently, many people obtain CBD online without a medical marijuana license, which is legal in most states.
Is cannabidiol legal?
Animal studies, and self-reports or research in humans, suggest CBD may also help with: