Reduced resistance to common illnesses Suppression of the immune system
Growth disorders
Increase of abnormally structured cells
Rapid destruction of lung fibres
Study difficulties: reduced ability to learn and retain information
Apathy, drowsiness, lack of motivation
Personality and mood changes
Inability to understand things clearly
marijuana users, often has a multicausal explanation, with numerous factors impacting behavior, such as increased life stress, aggressive personality traits, multidrug use, or a history of violent behaviour.