Related Experiment Video
Updated: May 20, 2026
07:23
Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities
Published on: July 29, 2014
Opioid genetics: the key to personalized pain control?
R Branford1, J Droney, J R Ross
1Department of Medicine, Royal Marsden NHS Foundation Trust, London, UK.
Clinical Genetics
|July 12, 2012
Summary
Personalized prescribing of strong opioids remains challenging due to complex genetic influences on individual patient responses. Further research is needed to replicate findings and achieve safe, effective pain management.
Area of Science:
- Pharmacogenetics
- Pain Management
- Clinical Pharmacology
Background:
- Several strong opioids are available for moderate to severe pain relief.
- Population-level studies show no significant differences in efficacy or adverse reactions among these opioids.
- Individual responses to opioids vary significantly, indicating a role for genetic factors.
Purpose of the Study:
- To review recent advances in opioid pharmacogenetic studies.
- To explore associations between candidate genes and opioid response elements.
- To highlight the ongoing challenge of achieving personalized opioid prescribing.
Main Methods:
- Review of current literature on opioid pharmacogenetics.
- Focus on studies investigating genetic influences on analgesic effects.
- Examination of genetic associations with upper gastrointestinal and central adverse reactions.
Main Results:
- Genetic influences on opioid response are complex and not fully understood.
- Promising results from smaller studies have not been consistently replicated in larger cohorts.
- Candidate gene associations with opioid response are an active area of research.
Conclusions:
- Personalized opioid prescribing for safe and effective symptom control is currently elusive.
- Further robust, replicated research is necessary to advance personalized prescribing.
- Understanding genetic variations is key to optimizing individual opioid therapy.
Related Concept Videos
01:25Analgesia and Pain Management
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...
01:20Opioid Analgesics: Morphine and Other Natural Cogeners
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...
01:15Opioid 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...
01:22Opioid Receptors: Overview
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...
01:29Pharmacogenetics and Pharmacogenomics: Overview
Pharmacogenetics and pharmacogenomics examine how genetic factors influence an individual's response to drugs. While pharmacogenetics focuses on the impact of specific genetic variants on drug effects, pharmacogenomics takes a broader approach, studying how genetic variation across populations contributes to differences in drug responses. These fields aim to explain why individuals may experience varying levels of efficacy or adverse reactions to the same medication.Variability in drug...
01:29Pharmacogenomics: Identification of New Drug Targets
Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...