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Opioid Analgesics: Synthetic and Semisynthetic Opioids01:15

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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

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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...
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Analgesia and Pain Management01:25

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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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Opioid Receptors: Overview01:22

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Opioid receptors, including the mu (μ, MOR), delta (δ, DOR), and kappa (κ, KOR) types, belong to the rhodopsin family of G protein-coupled receptors. These receptors are located throughout the central and peripheral nervous systems and in non-neuronal tissues such as macrophages and astrocytes. Opioid receptor ligands can be categorized into agonists or antagonists. Highly selective agonists include [d-Ala2, MePhe4, Gly(ol)5]-enkephalin or DAMGO for MOR, [D-Pen2,...
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Drugs Affecting GI Tract Motility: Opioids as Antidiarrheal Agents01:17

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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.
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Pain01:20

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Pain serves as a critical warning signal that alerts the body to potential or actual harm. When mechanical pressure on the skin is intense, such as from a sharp pinch, the sensation transitions from touch to pain. Similarly, extreme temperatures, like a hot pot handle, convert the sensation of heat into pain. Pain can also result from overstimulation of other senses, such as blinding light, loud noise, or the intense heat from habañero peppers. This ability to sense pain is essential for...
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Updated: Jul 20, 2025

Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities
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Narcotic analgesics.

W Watson Buchanan1, K D Rainsford2, Colin A Kean3

  • 1Department of Medicine, McMaster University, Hamilton, ON, L8P 1H6, Canada.

Inflammopharmacology
|July 29, 2023
PubMed
Summary
This summary is machine-generated.

Opium

Keywords:
CodeineHeroinMorphineNarcoticsOpiumPain

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Area of Science:

  • Pharmacology
  • Medical History

Background:

  • Opium's historical use dates back to ancient civilizations.
  • Opium-derived products have been documented by Assyrians, Egyptians, and Romans.

Purpose of the Study:

  • To trace the historical usage and scientific isolation of opium derivatives.
  • To highlight the therapeutic value and addiction potential of opioids.

Main Methods:

  • Historical literature review of opium use.
  • Documentation of key scientific discoveries related to morphine isolation.

Main Results:

  • Opium use is traced through ancient history to figures like Avicenna, Paracelsus, and Shakespeare.
  • Morphine was isolated in the early 19th century by Derosne and Sertürner.
  • Opioids became a significant addiction issue by the mid-1800s.

Conclusions:

  • Opium derivatives possess significant therapeutic value for pain management.
  • Historical use and scientific advancements reveal the dual nature of opioids as both beneficial and addictive substances.