How safe is marijuana really?

1. The first major change involves the rising concentrations of tetrahydrocannabinol (THC).As the potency of this drug increased over time, a number of thresholds of toxicity have been exceeded.
2. The anxiety and depression problems resulting from THC consumption are nothing new, but they are much more common now. (I have seen more cases in the last year than in the 4 years prior combined.)
3. Schizophrenia:  All who have suffered this complication have experienced a major decline in functional capacity, often becoming permanently disabled. The prognosis for this condition is very poor. Similar presentations can result from contaminated marijuana.