The original intention for methadone maintenance treatment was to reduce illegal heroin use and the criminal acts that are associated with heroin addiction.
The misuse of alcohol results in 2.5 million deaths each year globally.
Major heroin withdrawal symptoms peek about 48 and 72 hours after the last heroin dose and subside after about a week.
Undesirable psychological effects caused by Ecstasy use occur in up to 60% of people who use Ecstasy, and can be defined as side effects of the drug.