Cannabis oil helped many people at my dispensary dramatically reduce their use of Oxytocin (these were legit severe pain patients - though I worked with a cannabis company that donated edibles to a safe injection site, and anecdotally it seemed to help users with their withdrawal symptoms and to give them a greater period between using).

For sleep you want 'old' cannabis. The THC 'degrades' into CBN which is the sleep inducing cannabinoid. Air and light will help you create your sleepy smoking