Nowadays, there are more standardized analgesic drugs for cancer pain. The most common drugs for advanced cancer pain or those that can account for 90% of the overall pain relief are mainly opioid analgesics. At present, the common morphine-based drugs in clinical practice include morphine hydrochloride extended-release tablets, morphine sulfate extended-release tablets, oxycodone hydrochloride extended-release tablets, hydromorphone, oxycodone, fentanyl transdermal patch, and some mild buprenorphine transdermal patch, which are some common drugs for treating cancer pain caused by advanced cancer. Because cancer can affect the peripheral nerves and cause neuralgia, gabapentin or pregabalin are usually used in combination to treat neuralgia. For some cancers that metastasize to the bone or are caused by bone problems, such as bone metastasis or bone cancer, non-steroidal anti-inflammatory and analgesic drugs can also be added, which can be applied simultaneously in a triple combination, that is, opioid drugs, i.e. morphine drugs, plus ion channel drugs, plus non-steroidal anti-inflammatory and analgesic drugs, which can effectively control cancer pain. Because of the rapid development and onset of cancer, the analgesic regimen is not fixed, but needs to be dynamically observed and adjusted.