It must, however, be clearly stated that there is still not enough literature on the subject matter of the use of cannabis in psychotherapy as a number of studies are still being carried out.  Cannabis contains THC and CBD which are known to have effects with the brain and elicit certain body reactions. It is on this basis that it is used for some mental conditions. A closer look into the relationship between the constituent of cannabis and the effects of some of these conditions gives a better picture of why cannabis seems to have a role in psychotherapy.