What are the really BAD long-term and short-term effects of using cannabis?
Although there is still a lot to be learnt, and many people want to argue that there are no harmful consequences to using cannabis, there are quite a few problems we know about, and quite a few potential problems that are worrying but not yet quite proven yet. Bad effects while under the influence of cannabis can include increased appetite (and weight gain), anxiety, inability to concentrate, loss of short-term memory, and circulation effects (showing up at first as red-eye), which may increase risks of heart attacks and strokes. These are mainly due to the carbon monoxide that comes from burning the drug, but the pleasurable and addictive effects of cannabis keep people inhaling the carbon monoxide and other gasses that cause the problems. There are three times more cancer-causing chemicals in marijuana smoke than in tobacco smoke, so that is a problem. Long-term effects seem mostly reversible; that is, several months after stopping cannabis, memory and concentration start to get back
