People who take cancer pain medicines rarely become addicted to them.
Addiction is a common fear of cancer patients who take pain medicine.
Such fear may prevent people from taking the medicine. Or it may cause family members to encourage you to "hold off" as long as possible between doses.
Addiction is defined by many medical societies as uncontrollable drug craving, seeking, and use. When opioids (also known as narcotics) — the strongest pain relievers available — are taken for pain, they rarely cause addiction as defined here.
When you are ready to stop taking opioids, the doctor gradually lowers the amount of medicine you are taking. By the time you stop using them completely, the body has had time to adjust.
Talk to your doctor, nurse, or pharmacist about how to use pain medicines safely and about any concerns you have about addiction.
Courtesy of http://www.mesorfa.org/pain/index.php?PHPSESSID=622fc7769b8039fd5a0be7ed88491412#importantFacts
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Early pain relief from mesothelioma is highly recommended