Is there an antidote to meth?

Addictions are chronic diseases that can be arrested by total abstinence from mood-altering drugs (including alcohol) and psychotherapy or other support to assist the person in overcoming the emotional and psychological barriers to recovery.

There is no cure for any addiction, in the sense that things can be put back the way they were before. Alterations remain in the brain's structure that virtually guarantee revival of the addiction if drugs are again used. At present, there is no way to reverse that, which is the reason that changes must be made in lifestyle and outlook to minimize the desire to use again, even one time.