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Opioid Analgesics: Synthetic and Semisynthetic Opioids01:15

Opioid Analgesics: Synthetic and Semisynthetic Opioids

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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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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The development of extended-release formulations has facilitated the transition from intravenous to oral medication, offering a more convenient and patient-friendly approach to drug administration. This transition, however, requires careful management to ensure that therapeutic drug levels are maintained, preserving efficacy and avoiding adverse effects. Understanding pharmacokinetic principles and dosage calculations is critical during this process.Pharmacokinetics of the...
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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, D-Pen5]-enkephalin or DPDPE for...
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Opioid conversions in acute care.

Asad E Patanwala1, Jeremiah Duby, Dustin Waters

  • 1College of Pharmacy, University of Arizona, Tucson, AZ 85721, USA.

The Annals of Pharmacotherapy
|February 15, 2007
PubMed
Summary

Opioid conversion tables in acute care settings are often inaccurate. Establishing evidence-based equianalgesic dose ratios (EDRs) is crucial for safe and effective opioid pain management.

Area of Science:

  • Pharmacology
  • Pain Management
  • Evidence-Based Medicine

Background:

  • Opioid conversion tables are widely used but often lack robust evidence.
  • Existing tables may not accurately reflect equianalgesic dose ratios (EDRs).
  • Acute care settings present unique challenges for opioid conversion due to rapidly changing patient status.

Purpose of the Study:

  • To critically evaluate the historical basis and limitations of current opioid conversion tables.
  • To review existing literature on opioid equianalgesia.
  • To establish an evidence-based EDR table for acute care settings.

Main Methods:

  • Comprehensive literature search of MEDLINE and bibliographies (1966-2007).
  • Inclusion of relevant articles, prioritizing higher-level evidence over case reports.

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  • Evaluation of all identified data sources for relevance.

    • Main Results:

    • Opioid conversion tables are prevalent in medical literature but vary in accuracy.
    • Limited evidence supports many cited dose ratios, especially for acute care.
    • An EDR table was developed based on the best available evidence, acknowledging conversion barriers.

    Conclusions:

    • Relying solely on opioid conversion tables for dose adjustments in acute care is an oversimplification.
    • Accurate opioid dosing requires considering patient- and institution-specific factors.
    • EDR calculation is a vital component of a multidisciplinary pain management approach.