Medicine
Opioid-Induced Hyperalgesia vs. Tolerance in Chronic Pain Patients
Quick fact
Opioid-induced hyperalgesia (OIH) is a paradoxical reaction where opioids increase pain sensitivity, sometimes even triggering pain in areas that weren't previously painful. It can occur even with normal doses, not just after prolonged high-dose use.
Why this is interesting
You're taking a powerful painkiller, yet your pain seems to get worse. How can a drug meant to relieve pain actually make it more intense?