Everything you may take can produce some sort of side effect. Like every medication, CBD is something that may cause some sort of effect. Although it is unlikely to experience side effects when it comes to CBD, it is possible. Side effects may include tiredness, diarrhea, changes in appetite, and weight gain or weight loss. Even though CBD is considered safe and effective, you may want to ask your doctor before ingesting CBD products as it may make any medication you are taking more or less effective. It is important to be aware of these unwanted symptoms as they can be managed.