Journal
JOURNAL OF GENERAL INTERNAL MEDICINE
Volume 36, Issue 7, Pages 2074-2084Publisher
SPRINGER
DOI: 10.1007/s11606-020-06504-8
Keywords
cannabidiol; drug-drug interactions; cannabinoids; mechanism; cytochrome P450
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CBD, a non-intoxicating phytocannabinoid, has therapeutic effects and has been approved by the FDA for the treatment of two severe forms of pediatric epilepsy. Despite its widespread use for various indications, it can interact with common medications and substances such as acetaminophen and alcohol.
Cannabidiol, a non-intoxicating phytocannabinoid, has potential therapeutic effects over a broad range of disorders. Recently, there has been increased interest in CBD, as several studies showed promising anticonvulsant efficacy with few side effects. In 2018, a CBD-based oral solution, Epidiolex (R), was approved by the FDA to treat two severe forms of pediatric epilepsy, Dravet syndrome, and Lennox-Gastaut syndrome. Although only these two syndromes are recognized indications for CBD, it has been consumed in an unregulated fashion for a variety of indications including chronic pain, muscle stiffness, inflammation, anxiety, smoking cessation, and even cancer. While CBD legislation in the USA is confusing due to the differences in state and federal laws, CBD has proliferated in the US market in several forms such as CBD oil or capsules, hemp oil/extract, and also as an ingredient in several dietary supplements, syrups, teas, and creams. With the ever-increasing use of CBD and its widespread availability to the general public, it is important to examine and report on possible drug-drug interactions between CBD and other therapeutic agents as well as addictive substances such as alcohol and tobacco. A detailed literature search for CBD's possible interactions was conducted using online databases. As expected, CBD has been reported to interact with anti-epileptic drugs, antidepressants, opioid analgesics, and THC, but surprisingly, it interacts with several other common medications, e.g. acetaminophen, and substances including alcohol. This review provides a comprehensive list of interacting drugs. The possible mechanisms for these drug-drug interactions are presented in table format. Given the growing popularity of CBD as a medication and the dearth of available information on CBD drug-drug interactions, it is critical to be aware of current drug-drug interactions and it will be important to investigate the impact of CBD upon concomitant medication use in future randomized, controlled trials.
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