Related Experiment Video
Updated: Jul 19, 2026
02:26
Intracranial Pharmacotherapy and Pain Assays in Rodents
Published on: April 9, 2019
Recent advances in opioid pharmacology
1Department of Anesthesiology, Leiden University Medical Center, Leiden, the Netherlands. anes.research.unit@worldmail.nl
Current Opinion in Anaesthesiology
|October 5, 2006
Summary
Recent research highlights sex differences in how the body processes morphine, affecting pain relief and side effects like respiratory depression. Understanding these variations is key to safer opioid use.
Area of Science:
- Pharmacology
- Neuroscience
- Pain Management
Background:
- Opioids, particularly morphine, are effective analgesics but have significant side effects.
- Understanding sex-based differences in opioid response is crucial for optimizing pain management.
Purpose of the Study:
- To review recent advancements in sex-related differences in morphine pharmacodynamics.
- To explore the role of morphine metabolites and the nociceptin/orphanin FQ receptor system.
- To examine acute opioid tolerance and opioid-induced side effects, including respiratory depression and itch.
Main Methods:
- Literature review of recent studies on sex differences in opioid research.
- Analysis of data concerning morphine metabolism and receptor interactions.
- Investigation of factors modulating opioid effects, such as P-glycoprotein.
Main Results:
- Significant sex-related variations exist in morphine's effects on pain perception.
- Morphine metabolites and the nociceptin/orphanin FQ system show sex-specific modulations.
- Opioid-induced respiratory depression and itch exhibit sex-dependent characteristics.
Conclusions:
- Sex is a critical biological variable influencing opioid pharmacodynamics and pharmacokinetics.
- Further research into sex differences can lead to more personalized and safer opioid analgesic strategies.
- Targeting sex-specific pathways may mitigate adverse opioid effects.
More Related Videos
Related Concept Videos
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...
01:25Analgesia 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...
01:22Opioid 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...
01:20Opioid 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...
01:17Drugs Affecting GI Tract Motility: Opioids as Antidiarrheal Agents
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...
Opioids, widely used antidiarrheal agents, mitigate diarrhea by slowing down...
01:15Drug Abuse and Addiction: Pharmacological Phenomena
Drug dependence, abuse, and addiction are complex phenomena that can precipitate various abnormal states. Physical dependence refers to a state of pharmacological adaptation to a drug. This adaptation often results in tolerance—a reduced response to the drug after repeated administrations. When the drug use is abruptly stopped, withdrawal symptoms occur due to the body's need to readjust from the pharmacologically induced imbalance. However, tolerance and withdrawal symptoms do not necessarily...