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| Marijuana that has been inhaled will produce psychoactive symptoms almost immediately with the peak effects within 15 – 30 minutes.  There are many patient variables that can determine the absorption rates and amount of THC entered into the vascular system.  The recommendation within legal marijuana markets is 10mg of THC.  With inhalation, approximately 2 – 3 mg of THC is sufficient to produce psychoactive effects. 
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