The key symptom of hyperalgesia is feeling increased sensitivity to pain without additional injury or worsening of another condition. OIH has three main symptoms: an increase in the intensity of the pain that you feel over time. spread of the pain to another location other than the initial site.
What does hyperalgesia feel like?
People with hyperalgesia tend to feel extreme pain even though an injury or medical condition has not gotten worse. This pain may get worse over time, and it may extend to other areas of the body. It may also become a new or different type of pain than the original pain.
Can a lot of painkillers lead to hyperalgesia?
Causes of Hyperalgesia If you take opioids or opioid painkillers, you can develop opioid-induced hyperalgesia. Although opioids are used as painkillers, higher doses can make your nociceptors more sensitive to painful stimuli.
What is the likely psychological basis for opioid-induced hyperalgesia?
It is generally thought to result from neuroplastic changes in the peripheral and central nervous system (CNS) that lead to sensitization of pronociceptive pathways.
How is opioid-induced hyperalgesia treated?
Possible treatment regimens include ketamine, dextromethorphan, and nonsteroidal anti-inflammatory drugs (NSAIDs), opioid switching, amantadine, buprenorphine, α(2) agonists, and methadone.
What is allodynia and hyperalgesia?
Allodynia (pain due to a stimulus that does not usually provoke pain) and hyperalgesia (increased pain from a stimulus that usually provokes pain) are prominent symptoms in patients with neuropathic pain.
Why does opioid-induced hyperalgesia happen?
What causes OIH? The mechanism behind opioid-induced hyperalgesia is complex and involves molecular and chemical changes in the brain and spinal cord. Opioids tend to activate specific receptors that block painful signals from reaching the brain.
How do you treat opioid-induced hyperalgesia?
To help with pain relief during this period, non-opioid medications like NSAIDs, gabapentin, antidepressants and acetaminophen may be used. Frequently, a rotation to a different opioid such as methadone is done to help taper down to improve opioid-induced hyperalgesia.
Is there a cure for hyperalgesia?
Ketamine is effective in reversing hyperalgesia and augmenting the effects of opioids in patients receiving large doses, but its adverse effects prevent it from being a viable treatment option. Dextromethorphan is another NMDA receptor antagonist that has been investigated for the treatment of OIH.
Can hyperalgesia be reversed?
Sensitization of pain pathways in the dorsal horn of the spinal cord leads to the emergence of hyperalgesia. Bonin and De Koninck now show that reactivation of sensitized pain pathways in mice with mechanical hyperalgesia renders them labile and enables the hyperalgesia to be reversed.
