It’s not a good idea to mix CBD and alcohol. Both substances cause a reduction in blood pressure. When combined together, this may cause blood pressure to drop too far, causing dizziness and fainting. Both CBD and alcohol are considered sedatives and hypotensives (blood pressure-lowering agents). When used together, it can result in a much stronger impact that could lead to side effects like sedation, dizziness, and fainting. While mixing alcohol and CBD is not likely to produce more than mild side effects, it’s a good idea to keep them separate as much as possible.