Opioids are mainly pain-relieving drugs, which are alkaloids extracted from the opium poppy and derivatives synthesized in vitro that bind to central specific receptors and can relieve pain and produce euphoria. Opioids mainly include codeine, dihydrocodeine, oxycodone, methadone, morphine, fentanyl, and dulcolax. Opioids mainly have pain-relieving and some have cough suppressant effects. When using opioids, special attention should be paid to these drugs, if used for a long time or improperly, it is easy to produce the phenomenon of addiction, so be sure to follow the recommended use and dosage of medical advice to use. And many of these drugs are special controlled substances, so be sure to follow the relevant provisions of drug management, reasonable prescription and use of such drugs.