No, Aspirin has a different chemical struture to that of heroin, it also can not cross the blood brain barrier because it does not have fatty molecular structure. The blood brain barrier is a protective layer that forms around the brain that is made of lipid (fatty acid molecules), it serves to keep out toxins, but however will allow drugs with a fatty molecular structure to slip inside, this includes all psyco active drugs such as heroin. Therefore, to treat withdrawl from heroin, another fatty molecular drug needs to take its place, and because heroin in an opaite drug, methadone is used as treatment because it is in the same opaite family, but less neurotoxic and has a lower abuse level.
