Question

a heroin addict went through the following treatment to stop his drug abuse: a doctor gradually replaced his daily heroin dosage with the legal drug methadone. what kind of treatment is this

Answer 1

Methadone has been used since 1960 as a substitute for opiates among heroin users.
(Substitution treatment)
It is primarily used as replacement therapy in heroin addicts: methadone has properties comparable to heroin, but it has a more favorable pharmacological profile. This transfer of dependence can stabilize the patience and facilities rehabilitation.

Answer 2

Supervised medication