no way. it is almost a proven fact that is not the case. using marijuana does not cause people to use other drugs people that use other drugs use them because they want to use other drugs not because marijuana led them to it. some people just like to use drugs and get high and alot of those people may find that marijuana isnt enough for them so they try other stuff but that doesnt mean marijuana led them to use other drugs. infact some people start using hard drugs first then try marijuana and dont like it at all. so it can go both ways.