Yes,I can,and I think you can do that too.
NO, you cannot... Not legally anyway. Some doctors will provide it to you, but not cheaply (about $200 pesos per script + the cost of the methadone). I've lived in Acapulco for many years and although it is one of the easiest cities to get narcotics, methadone is VERY controlled in Mexico. You can certainly obtain it legally by going through the proper channels (addiction clinics). Go here for more info: www.metadona.com.mx