Though it's often well-tolerated, CBD can cause side effects, such as dry mouth, diarrhea, reduced appetite, drowsiness and fatigue. CBD can also interact with other medications you're taking, such as blood thinners. Another cause for concern is the unreliability of the purity and dosage of CBD in products.
Nausea and gastrointestinal issues are a pretty common side effect of CBD oil. This can lead to vomiting, diarrhea, dizziness and other symptoms associated with a digestive problem (think how you would feel after eating something that disagreed with you).
CBD: Is it addictive? While current scientific evidence suggests that heavy cannabis use may increase the risk of dependence in some people, CBD by itself does not appear to be addictive. However, research into the long-term effects of CBD usage is still in its early stages.