CBD with low or no THC is a food supplement, not a medication, so its side effects are nonexistent or insignificant.
Most people experience no side effects at all, but occasionally people do experience nausea, diarrhea, dry mouth, drowsiness, dizziness and changes in appetite when using CBD.
These side effects are more common when using CBD that is of poor quality or has more than trace amounts of THC. To avoid experiencing side effects, it’s important that you purchase quality products.
If you’re concerned about how you will react to CBD, consult with your general practitioner.