>>9500723No, but it makes you lazy and unproductive.
If you're a weak minded faggot that has a family history of mental illness or trauma/abuse weed can trigger it and lead to psychosis.
Have seen it happen to at least 3 people I know.
It ultimately depends on the person since it affects everyone differently. Some people can smoke a blunt in the morning and work all day fine, others will pass out and not be able to do shit for the entire day.
