Side effects of CBD may include nausea, tiredness and irritability, and it may interact with some medications, such as warfarin. However, there are very few well-conducted trials to back up these claims, apart from the use of CBD in two rare and severe forms of epilepsy, Lennox-Gastaut syndrome and Dravet syndrome. Most trials that have been published have used either marijuana, a combination of CBD and THC , or only involved animals.
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