Final answer:
Methadone treatment is commonly used in the treatment of heroin addiction to alleviate withdrawal symptoms and manage addiction.
Step-by-step explanation:
Methadone treatment is commonly used in the treatment of heroin addiction. Heroin is a major opioid drug of abuse that can lead to physical dependence and addiction. Methadone is a synthetic opioid that is less euphorigenic than heroin, and it is prescribed to alleviate withdrawal symptoms and help individuals manage their addiction.