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Related Concept Videos

Amnesia01:13

Amnesia

218
Amnesia is a condition marked by long-term memory loss, which impairs the ability to recall past events or create new memories.
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...
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Opioid Analgesics: Synthetic and Semisynthetic Opioids01:15

Opioid Analgesics: Synthetic and Semisynthetic Opioids

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Synthetic and semisynthetic opioids are pivotal in pain management and tackling opioid addiction. Semisynthetic opioids, including morphinans (morphine derivatives), oxycodone, oxymorphone, hydrocodone, and hydromorphone, have improved pharmacokinetic profiles compared to morphine. Additionally, heroin and 6-MAM (6-Monoacetylmorphine) show better CNS penetration than morphine due to heightened lipid solubility. Hydromorphone, a potent opioid, undergoes hepatic metabolism to form the active...
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Opioid Analgesics: Morphine and Other Natural Cogeners01:20

Opioid Analgesics: Morphine and Other Natural Cogeners

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Opioids are a class of drugs that mimic endogenous opioid peptides and act on opioid receptors, and help in pain relief. These compounds are classified as natural, synthetic, or semi-synthetic. Natural opioids, like morphine, codeine, and thebaine, are derived from the opium poppy plant (Papaver somniferum or Papaver album) and are termed opiates. Synthetic opioids are artificial, while semi-synthetic opioids combine natural and synthetic compounds. Morphine, a prototypical opioid, possesses a...
448
Dissociative Amnesia01:21

Dissociative Amnesia

203
Dissociative amnesia is a complex psychological condition that manifests as an inability to recall personal information, often tied to traumatic or stressful events. Unlike general amnesia, individuals with this condition retain the ability to perform routine activities and procedural tasks, such as operating a phone or navigating public transportation, yet experience profound gaps in autobiographical memory. These lapses may encompass significant life events, such as suicide attempts or...
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Analgesia and Pain Management01:25

Analgesia and Pain Management

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Pain is critical to various clinical pathologies, provoking an urgent need for effective management. Pain, whether acute or chronic, is a complex neurochemical process. Its alleviation depends on the type, with nonopioid analgesics effective for mild to moderate pain, such as musculoskeletal or inflammatory pain, while neuropathic pain responds best to anticonvulsants, tricyclic antidepressants, or serotonin/norepinephrine reuptake inhibitors. For severe acute or chronic pain, opioids may be...
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Drugs Affecting GI Tract Motility: Opioids as Antidiarrheal Agents01:17

Drugs Affecting GI Tract Motility: Opioids as Antidiarrheal Agents

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Diarrhea, a condition marked by frequent loose or watery bowel movements, can be triggered by multiple factors such as viral or bacterial infections, food intolerances, anxiety, medications, and digestive disorders. Symptoms may include abdominal pain, bloating, nausea, and cramping. Severe or prolonged diarrhea can lead to complications like electrolyte imbalances, malnutrition, and dehydration if left untreated.
Opioids, widely used antidiarrheal agents, mitigate diarrhea by slowing down...
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Opioid-Associated Amnestic Syndrome.

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  • 1Internal Medicine, Western Michigan University Homer Stryker M.D. School of Medicine, Kalamazoo, USA.

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Summary

Opioid-associated amnestic syndrome (OAS) is a newly identified condition linked to opioid misuse, particularly fentanyl. It presents as acute anterograde amnesia and is diagnosed after ruling out other neurological causes.

Keywords:
amnesiahippocampal edemaopioid crisisopioid-associated amnestic syndromesubstance abuse

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Area of Science:

  • Neurology
  • Toxicology
  • Addiction Medicine

Background:

  • The opioid crisis has led to an increase in opioid-related deaths and hospitalizations.
  • Opioid-associated amnestic syndrome (OAS) is a recognized neurological complication of opioid abuse.

Observation:

  • Patients with OAS typically present with acute anterograde amnesia.
  • Current opioid abuse, frequently involving fentanyl, is a common feature.
  • Diagnosis involves excluding other conditions like encephalitis and seizures.

Findings:

  • OAS is characterized by bilateral hippocampal edema on neuroimaging.
  • The hallmark clinical presentation is anterograde amnesia.

Implications:

  • This case underscores the importance of recognizing OAS in patients with opioid abuse.
  • Understanding OAS is crucial for accurate diagnosis and management of opioid-related neurological complications.
  • Further research is needed to elucidate the pathophysiology and long-term outcomes of OAS.