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British Medical Bulletin 47:718-731 (1991)
© 1991 The British Council
research-article |
Opioid-responsive and opioid-non-responsive pain in cancer
Department of Palliative Medicine, United Medical and Dental Schools of Guy's and St Thomas's Hospitals, St Thomas's Hopital London, UK
Abstract
Cancer pain in general responds in a predictable way to analgesic drugs and drug therapy is the mainstay of treatment, successfully controlling pain in 7090% of patients. The two major problem areas are pain associated with nerve damage, and incident" (movement-related) bone pain. Nerve damage pain tends not to respond well to morphine or other opioids. The difficulty with severe incident pain is that if the dose of opioid is titrated sufficiently to relieve the pain on weight-bearing or on movement and is then given regularly at this level, it is too much for the patient at rest. The patient may then experience excessive side-effects at rest, but still have pain on moverment. Other examples of pain which may be resistant to treatment with opioid analgesics are bladder and rectal tenesmus, pancreatic pain, and pain associated with decubitus ulcers or other superficial ulcers subjected to perssure or shearing forces. Management of non-opioid-responsive pain may include a variety of treatments involving adjuvant analgesic drugs and non-drug measures.
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