Personal experience: I've used cannabis for the past 8 years to help me sleep. Im currently on vacation in a country where it is illegal and unobtainable. Alternating between melatonin and histamine based sleep aids has worked well to help sleep. I took CBD oil and a bit of nicotine to help with withdrawal symptoms. By the third day I was fine, and I'm on day 15 of the trip with no noticeable withdrawal symptoms.