Thanks for query,
Your friend has Methadone
side effects .I believe its Methadone & not methamphetamine
Methadone is a opioid pain reliever, similar to morphine. An opioid is sometimes called a narcotic. It also reduces withdrawal symptoms
in people addicted to heroin or other narcotic drugs without causing the "high" associated with the drug addiction
Just wash his brain that if he will be untreated this worms may gives harmful effect 7 ready him for treatment.
He needs Psychiatric consultation.