As with any food supplement, it’s always recommended to talk to your doctor before taking CBD, especially if you are taking medication. CBD is known to be metabolised in the liver by cytochrome P450 (CYP450), a family of enzymes that breaks down over 60 percent of prescription medications and so could increase or decrease sensitivity to other drugs. For example, some possible interactions with blood thinners like Warfarin have been reported.
The UK Food Safety Agency (FSA) recommends that pregnant or breastfeeding women should not currently use CBD because of the lack of safety evidence for CBD in young children. Similarly, CBD should only be used by adults.