I think you are referring to the other cannibinoids in marijuana such as CBD (cannabidol) and CBN (cannabinol). CBD is generally known to give you that sleepy feeling.
http://www.idmu.co.uk/cbd.htm

Hope that helps.
Blazed and Confused Reviewed by Blazed and Confused on . Marinol and cooking or additions I discovered accidently that smoking (now vaping) marijuana can help me to sleep through the nite. It doesn't work completely every nite, and is dependent on the quality of herb that I have on hand. Marijuana also took away most of the nausea I experienced constantly (reason unknown). The supplement Pregnelolone took away the remaining nausea. Marijuana used to make me nauseous and I stopped smoking it for years and years because of it. So something has changed, probably hormonally in my Rating: 5