There is a standard series of stepwise administration of drugs for the treatment of cancer pain. Depending on the level of pain, different steps of analgesic drugs are generally given. In relatively weak pain, non-steroidal anti-inflammatory analgesics, such as Devon or Celecoxib capsules, are given. If the pain is further severe and this drug does not stop the pain, second-step analgesics such as tramadol are given. Further pain worsens, and nowadays extended-release morphine-like preparations are usually given, the most used being oxycodone hydrochloride extended-release tablets. If oral administration is not possible, drugs such as fentanyl transdermal patches are also given. In addition, if the pain is accompanied by nerve, gabapentin capsules are often given to enhance the effect of pain relief. In conclusion, cancer analgesia is also a skill that the specialist needs to master. Patients do not need to have much mastery of this medication and just listen to the doctor’s advice without worry. In addition, third-stage analgesics are state-controlled drugs and must be prescribed at the appropriate level of hospital specialties in order to be used.