Not all people who use marijuana move on to stronger drugs. Some users continue to use marijuana, and some even stop abusing it altogether. Unfortunately, some move on to stronger drugs. A study conducted by researchers showed that young people aged 12 to 17 who use marijuana are 85 times more likely to use cocaine than children who do not use it, and 60% of children who smoke marijuana before the age of 15 switch to cocaine. Sometimes marijuana is even combined with harder substances. Joints and blunts can be soaked in PCP, a powerful hallucinogen that comes in either liquid or white powder form. PCP is extremely powerful and is known to cause violent behavior. It also causes severe physical reactions such as seizures, coma and sometimes