On the other hand, it has caused great harm to social security. The maintenance treatment of methadone oral liquid can prevent people from continuing to inject * * *, thus avoiding the spread of AIDS ... The follow-up study on the pharmacological effects and side effects of methadone on adults 14 years and adolescents for 5 years shows that methadone has no toxic effects and little side effects. Common side effects are: constipation, brief introduction of methadone hydrochloride (referred to as methadone) as a μ opioid receptor agonist, which has similar curative effect and analgesic effect, and can produce respiratory depression, mydriasis and sedation. Compared with, it has the characteristics of longer action time, less tolerance and lower drug dependence, and is a substitute narcotic analgesic synthesized in Germany during World War II.

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