Hello and welcome to Healthcare Magic. Thanks for your query.
Cannabis can indeed cause a variety of psychological as well as physical effects. The symptoms which your son is having - altered perception of time, heightened sensory awareness, episodic memory, drowsiness
, etc. - are all known psychological effects of cannabis. These effects may be more pronounced in persons using cannabis for the first few times, which may be the reason your son's exagerrated symptoms. These effects shoud gradually wear off within 12 to 24 hours.
Henceforth it is important that he avoids cannabis or any other substance of abuse as he seems more prone for adverse effects.
Wish you all the best.
- Dr. Jonas Sundarakumar