He was starting to experience heavy chest pains and a racing heart due to smoking this, so he decided to stop 3 days ago. In the last 3 days he has had very bad chest pain, nausea, vomiting
, head aches, no appetite, hot and cold sweats and generally very unwell. And has not been able to work. Does anybody have any thoughts on the severity and length of these withdrawal symptoms, has this type of "synthetic drug" had similar effect on anyone else who has tried to give it up?