While most people tolerate hemp very well, there are some cases where people can experience side effects. Some people get drowsy when taking CBD. If you are just starting out with CBD it is best to take your first few doses in the evening. Other side effects can include mild nausea or stomach upset, and a small amount of people are allergic to CBD. If you experience any adverse effects from taking CBD, discontinue using it immediately. Consult your physician before taking CBD, especially if you are pregnant, nursing, have or suspect a medical condition or are taking any medications.