Does anyone have any experience? My ds is 19 years old and has smoked cannabis since the age of 15. We have tried everything to help him stop and I have spent thousands of pounds ( that I don’t have) on counselling but nothing has helped. Recently he has bouts of vomiting where he will be ill for 24 hours. It doesn’t seem to be a bug. I have now read about CHS (Cannabinoid Hyperemesis Syndrome). Yesterday he started vomiting again and has stomach pains. He has no appetite unless he has just smoked weed and has become so thin. He won’t let me call our GP today and when I have suggested the cause could be his smoking he won’t accept it. I’m going out of my mind with worry.