Oxycodone Controlled Release Tablets are opioid medications used for the relief of persistent moderate to severe pain. Oxycodone controlled release tablets are pure opioid receptor pure agonists, have affinity for opioid receptors in the brain and spinal cord, the action is similar to morphine, the main effect of analgesia, and secondly, also has anxiolytic, antitussive, cough, sedative effect, the drug effect can last for 12 hours. Clinically used to relieve persistent moderate to severe pain, such as cancer pain. The analgesic effect of oxycodone can be enhanced with increasing doses, and the dose can be increased with the level of pain to maintain the treatment, and the maximum limit of its analgesia is limited by side effects. Side effects such as constipation, nausea and vomiting, dizziness and headache can occur during the use of oxycodone, and improper use can even cause respiratory depression, drug addiction, coma, severe hypotension and other adverse reactions. It should be noted that oxycodone should not be used in pregnancy, lactating women and patients with respiratory depression, craniocerebral injury, paralytic intestinal obstruction, acute abdomen, allergy to oxycodone, more than moderate hepatic and renal dysfunction, and before and after the surgery 24h can not be used for this drug. Oxycodone is administered in accordance with narcotic drugs and should be used strictly under medical supervision and in accordance with medical advice to avoid adverse reactions.