That said, it’s important to note that there are a number of possible side effects to using CBD oil, some of which include; mild stomach, drowsiness, dry mouth, fatigue, dysphoria and lightheadedness. However, when it’s used in moderate amounts, many people don’t experience any cannabis oil side effects whatsoever. Numerous studies have been carried out in the last couple of years, and the results have been highly supportive of the therapeutic potential, safety and the viability of the CBD oil. Its’ lack of serious negative side effects makes it an attractive option for medical purposes healing. That said, it’s important to note that if you are taking other medications, it is always a smart idea to consider the potential drug interactions.