I have a diagnosis of past delusions no auditory or visual problems which my new doctor says was caused by cannabis I was smoking 4.5 grams a day at the time. My doctor says that cannabis induced psychosis is the only type of psychosis that can go away. I have been totally sober for two years and now am almost off meds for it. I have not had any symptoms for five years when I was smoking one gram every two months before total sobriety during which I was medicated. I have never used any substance in a situation where it was physically hazardous. How many years without meds symptom free is needed for a good shot at a special issuance.