How does CBD cause side effects such as dry mouth, diarrhea, and loss of appetite?

There are a number of reasons as to why CBD oil can cause dry mouth, diarrhea, and other symptoms. Aside from a general predisposition that varies from individual to individual, it could also be as a result of taking too much CBD, or potentially due to interactions between CBD oil and other medications.

Everybody's body make-up is different. People react to stimuli differently. Generally, factors that increase the chances of adverse reactions include age, gender, history of adverse reactions, genetic factors, drug interactions etc. Apart from these, CBD dosage is not defined so it's quite hard to dose correctly.