if it's just weed you want to stop using there should be no problem just stop if it's something along the lines of stimulants IE: COKE CRANK ect. you will prob need some help if it's opiates [ heroin percocett that kinda thing] you will need to ween your self off of them a methadone detox program might be helpful if it is benzo's [ valium / xanax] you will also have to ween your self off stopping benzo's outright after an extended period of use can be very dangerous there are other alternative ways of stopping stimulants and opiates IBOGAINE has been used in holland for treating addicts for some time now it is illeagal in the US but there are a couple clinics in the states that have found a way around the law it is aval in canada and there is a clinic in mexico hope this will help some and i hope you can accomplish what your setting out to do good luck