I've stopped smoking k2 spice due to the sie effects its been 72 hrs im still having withdrawl syptoms, how long does this last and advice to cope?

Get treatment: I recommend getting an eval at a drug & alcohol program. Usually the eval is free or low cost. Not as much is known abt synthetic cannabinoids, as they haven't been around as long as other drugs. Cannabinoids are fat soluable, so they stay in the body longer. Some symptoms can last weeks to months. It gets better, just don't use & get support from others who "get it" because they were where u r.