OxyContin is the trade name and its generic name is Oxycodone Hydrochloride Extended-Release Tablets, there is no fixed dosing time for patients with advanced cancer, it is taken as needed. Oxycodone Hydrochloride Extended-Release Tablets are pain relieving medications that can provide pain relief within 12 hours, so they can be taken appropriately to relieve pain in cancer patients. Oxycodone Hydrochloride Extended-Release Tablets are used for the relief of persistent moderate to severe pain and must be swallowed whole, not broken, chewed or ground, when taken. If the tablets are broken, chewed or ground, this can result in rapid release of oxycodone with absorption of potentially lethal amounts. It can be taken every 12 hours at the time of use, and the dosage depends on the severity of the patient’s pain and history of previous analgesic use. In some patients, the administration of oxycodone hydrochloride extended-release tablets may trigger adverse effects of opioid agonists, as well as constipation, nausea, vomiting, dizziness, itching, headache, dry mouth, excessive sweating, drowsiness, and fatigue. Therefore, it is necessary to control the amount of use and to stop the drug promptly after the occurrence of serious adverse reactions. It is contraindicated in people who are allergic to the drug, pregnant and lactating women. It is also contraindicated in patients with hypoxic respiratory depression, craniocerebral injury, paralytic bowel obstruction, acute abdomen and other diseases. The specific use of drugs, follow the doctor’s instructions, do not self-medication.