Common Misconceptions in Cancer Pain Management Myth 1: Non-opioids are safer than opioids If the dose of opioids is correctly controlled, the adverse effects of the drugs are actively prevented and controlled, and the effects of long-term use on liver and kidney functions are considered, the use of opioids is safe. In contrast, non-steroidal anti-inflammatory analgesics can cause gastrointestinal and renal toxicity with long-term use, and can significantly inhibit platelet function, with a capping effect of the drug dose. Therefore, the use of opioids is safer and more effective for patients who need long-term analgesic medication. Myth 2: Only when the pain is severe can use analgesics In fact, for pain patients, timely, on time with analgesics is safer and more effective, and the strength and dose of analgesics required is also the lowest. In addition, long-term pain will also cause a series of physiological changes, affecting the patient’s mental health, and even the emergence of sympathetic nerve dysfunction, nociceptive hypersensitivity and abnormal pain and other intractable pain. Therefore, early treatment should be given. Myth 3: When the adverse reaction of opioids occurs, the drug should be stopped immediately Except for constipation, most of the side effects of opioids are temporary. Nausea, vomiting, excessive sedation and other side effects of opioids usually appear in the first few days of use, and the symptoms will disappear after a few days. Aggressive preventive treatment of opioid side effects can reduce or avoid the occurrence of side effects and allow patients to receive opioid pain management successfully. Treatment should be done as directed by a doctor; there is no benefit to taking medication randomly or not on time.