its a depressant. also it can slow your intestines down making your body move toxins out less quickly. that which could = feeling sick. also it will make the smoker hungry. someone i walked through this cleanse who smoked said that he actually started to feel high around the end of day 2. i assume this is from the fat burning and flushing that goes on during the detox. THC sticks in your fat cells so tell them they wont need to smoke. they will be high by day three anyway probably. ha haa.