Does Marijuana usage cause any harm to mental health?
Marijuana is known to trigger dissociative disorders in predisposed individuals.
Increasing numbers of people are reporting persistent episodes of depersonalisation (detachment from one's identity) and derealisation (detachment from one's environment), which were triggered by usage of marijuana. A recent study concludes that this fact is rarely discussed.
The relationship between marijuana and mental health is too complex to be termed "harmful" or "not harmful".
"For example, with respect to depression, the science is clear that the endocannabinoid system plays a role in mood regulation..." However, there are also data that ingested cannabis plant material likely leads to the development and worsening of depressive symptoms.