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cbd oil effects

Animal studies have shown some effect of CBD at relieving depression, possibly related to its strong anti-stress effect after either acute or repeated administration. 16

We look at nine medical conditions where CBD may be, or, has already proven to be, beneficial.

Conclusion: Topical CBD may be beneficial at relieving arthritis but no high-quality human studies prove this.

6. Sleep disorders

CBD has also been investigated for use in other forms of treatment-resistant epilepsy, usually in addition to conventional epilepsy medications. Results varied, but several trials showed CBD significantly reduced seizure frequency by almost 44% in most people. 3

Conclusion: CBD is unlikely to be effective by itself for nausea and vomiting. The combination of THC and CBD does seem to be effective for nausea and vomiting.

An observational study of CBD treatment reported an improvement in self-reported quality of life measures for people with non-cancer-related pain but there was no statistically significant improvement in those with cancer-related pain or with neurological symptoms. 8

Anxiety scores decreased in a large case series of 72 patients, with 57 patients (79.2%) reporting decreased scores within the first month after CBD treatment. 9

Devinsky O, Cilio MR, Cross H, et al. Cannabidiol: pharmacology and potential therapeutic role in epilepsy and other neuropsychiatric disorders. Epilepsia 2014;55(6):791-802. View abstract.

Gofshteyn JS, Wilfong A, Devinsky O, et al. Cannabidiol as a potential treatment for febrile infection-related epilepsy syndrome (FIRES) in the acute and chronic phases. J Child Neurol. 2017 Jan;32(1):35-40. View abstract.

Naftali T, Mechulam R, Marii A, et al. Low-dose cannabidiol is safe but not effective in the treatment of Crohn’s Disease, a randomized controlled trial. Dig Dis Sci. 2017 Jun;62(6):1615-20. View abstract.

Possibly Effective for

Harvey DJ. Absorption, distribution, and biotransformation of the cannabinoids. Marijuana and Medicine. 1999;91-103.

Casarotto PC, Gomes FV, Resstel LB, Guimaraes FS. Cannabidiol inhibitory effect on marble-burying behavior: involvement of CB1 receptors. Behav Pharmacol 2010;21(4):353-8. View abstract.

Monti JM. Hypnoticlike effects of cannabidiol in the rat. Psychopharmacology (Berl) 1977;55(3):263-5. View abstract.

Campos AC, Moreira FA, Gomes FV, et al. Multiple mechanisms involved in the large-spectrum therapeutic potential of cannabidiol in psychiatric disorders. Philos Trans R Soc Lond B Biol Sci 2012;367(1607):3364-78. View abstract.

As CBD grows in popularity, so does the research on it but there are currently few clinical studies on the effects of CBD oil. As such, some of these claims are better supported by studies than others.

To use CBD oil, place one or more drops under the tongue and hold the dose there for 30 to 60 seconds without swallowing. Capsules and gummies are easier to dose, although they tend to be more costly. CBD sublingual sprays are available as well.


There is some evidence that CBD interacts with seizure medications such as Onfi (clobazam) and boosts their concentration in the blood. Further research is needed.

CBD oil can interact with certain medications, including some drugs used to treat epilepsy. CBD inhibits an enzyme called cytochrome P450 (CYP450), which metabolizes certain drugs. By interfering with CYP450, CBD may either increase the toxicity or decrease the effectiveness of these drugs.

Part of this response could be explained by the way that CBD acts in the brain. In low doses, CBD may act as an agonist to several receptor sites, meaning it acts similarly to surrounding molecules that normally bind to the receptor, enhancing the signalling of those receptor sites. At higher doses, however, too much activity at the receptor site can lead to an opposite effect, negating the beneficial effects of CBD.