Re: “We shouldn’t ignore the effects of marijuana,” April 20.
The writer states he is bringing forward evidence-based information. He did not.
As a GP for 43 years, I have read both evidence-based and emotion-based articles on marijuana. Michel Perron’s commentary was emotion-based.
Marijuana as cause of psychosis is controversial — the user could be experiencing decreased anxiety or depression from marijuana: “reverse causality.” Respiratory difficulties and lung cancer have not been established — quite the opposite.
Studies have shown marijuana to decrease anxiety, decrease depression, increase hippocampus brain volume and maintain cognitive function in aging adults.
Paul Brigel, MD
Victoria