Marijuana can hinder learning and memory, too, for weeks after exposure. This implies that casual weekend smokers might always be functioning at a suboptimal level.
A study released Jan. 9 in the journal Neurogastroenterology and Motility even found that marijuana use is linked to a disorder called cyclic vomiting, which may be related to migraines and causes people to experience hours- or days-long vomiting episodes.
"Marijuana is complicated," Kertesz said. "It could be affecting your social life, your work life or even your tendency to get into accidents."
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