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Acetaminophen (Pharma Mastery Lecture 5)

Duration: 50:07

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This lecture offers a comprehensive overview of acetaminophen, a widely used analgesic and antipyretic medication. We will explore its pharmacokinetics, mechanism of action, clinical indications, and potential side effects. Emphasis will be placed on acetaminophen's hepatotoxicity, its metabolic pathways, and the risk factors associated with overdose. Management strategies, including the role of N-acetylcysteine as an antidote, will be discussed to equip healthcare professionals with the knowledge needed for effective patient care.

Study Objectives:

  • Understand the pharmacokinetics of acetaminophen, including absorption, distribution, metabolism, and excretion.
  • Describe the mechanism of action of acetaminophen and how it functions as an analgesic and antipyretic.
  • Identify the clinical indications for acetaminophen, along with recommended dosing regimens.
  • Recognize the side effects of acetaminophen, particularly hepatotoxicity, and the risk factors for overdose.
  • Discuss the metabolic pathways involved in acetaminophen toxicity, focusing on liver metabolism and the production of toxic metabolites.
  • Examine the clinical presentation of acetaminophen toxicity, including symptoms and lab findings.
  • Learn the management approach for acetaminophen toxicity, with a focus on N-acetylcysteine (NAC) therapy, its mechanism, and dosing strategies.

Disclaimer:
This video is not intended to provide assessment, diagnosis, treatment, or medical advice; it also does not constitute provision of healthcare services. The content provided in this video is for informational and educational purposes only.
Please consult with a physician or healthcare professional regarding any medical or mental health related diagnosis or treatment. No information in this video should ever be considered as a substitute for advice from a healthcare professional.

 

Acetaminophen - StatPearls - NCBI Bookshelf
https://www.ncbi.nlm.nih.gov/books/NBK482369/

AM404, paracetamol metabolite, prevents prostaglandin synthesis in activated microglia by inhibiting COX activity - PMC
https://pmc.ncbi.nlm.nih.gov/articles/PMC5729401/#:~:text=It%20has%20been%20shown%20that,but%20not%20peripherally%20%5B2%5D.

Acetaminophen - LiverTox - NCBI Bookshelf
https://www.ncbi.nlm.nih.gov/books/NBK548162/

A Systematic Review of the Evidence Behind Use of Reduced Doses of Acetaminophen in Chronic Liver Disease
https://fisherpub.sjf.edu/cgi/viewcontent.cgi?article=1215&context=pharmacy_facpub

4.7.1paracetamolreduceddosingadults.pdf
https://www.leedsformulary.nhs.uk/docs/4.7.1paracetamolreduceddosingadults.pdf

PharmGKB summary: Pathways of acetaminophen metabolism at the therapeutic versus toxic doses - PMC
https://pmc.ncbi.nlm.nih.gov/articles/PMC4498995/

Molecular structure of acetaminophen.   | Download Scientific Diagram
https://www.researchgate.net/figure/Molecular-structure-of-acetaminophen_fig1_262561825

Acetaminophen Relieves Inflammatory Pain through CB1 Cannabinoid Receptors in the Rostral Ventromedial Medulla | Journal of Neuroscience
https://www.jneurosci.org/content/38/2/322

Frontiers | Analgesic Effect of Acetaminophen: A Review of Known and Novel Mechanisms of Action
https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2020.580289/full

All manufacturers of prescription combination drug products with more than 325 mg of acetaminophen have discontinued marketing | FDA
https://www.fda.gov/drugs/information-drug-class/all-manufacturers-prescription-combination-drug-products-more-325-mg-acetaminophen-have-discontinued

Management of Acetaminophen Poisoning in the US and Canada: A Consensus Statement | Emergency Medicine | JAMA Network Open | JAMA Network
https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2808062

ACMT Position Statement: Duration of Intravenous Acetylcysteine Therapy Following Acetaminophen Overdose - PMC
https://pmc.ncbi.nlm.nih.gov/articles/PMC5330952/

Acetaminophen Side Effects: Common, Severe, Long Term
https://www.drugs.com/sfx/acetaminophen-side-effects.html

  • Understand the pharmacokinetics of acetaminophen, including absorption, distribution, metabolism, and excretion.
  • Describe the mechanism of action of acetaminophen and how it functions as an analgesic and antipyretic.
  • Identify the clinical indications for acetaminophen, along with recommended dosing regimens.
  • Recognize the side effects of acetaminophen, particularly hepatotoxicity, and the risk factors for overdose.
  • Discuss the metabolic pathways involved in acetaminophen toxicity, focusing on liver metabolism and the production of toxic metabolites.
  • Examine the clinical presentation of acetaminophen toxicity, including symptoms and lab findings.
  • Learn the management approach for acetaminophen toxicity, with a focus on N-acetylcysteine (NAC) therapy, its mechanism, and dosing strategies.

Following answers are created by ChatGPT. Occasionally the answer may be harmful, incorrect, false, misleading, incomplete, or limited in knowledge of world. Please contact your doctor for all healthcare decisions. Also, double check the answer provided by the AI below.

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Instructors

Dr. Mobeen Syed

Dr. Mobeen Syed

MD., MSc., MSc., BSc

Mobeen Syed is the CEO of DrBeen Corp, a modern online medical education marketplace. Mobeen is a medical doctor and a software engineer. He graduated from the prestigious King Edward Medical University Lahore. He has been teaching medicine since 1994. Mobeen is also a software engineer and engineering leader. In this role, Mobeen has run teams consisting of hundreds of engineers and millions of dollars of budgets. Mobeen loves music, teaching, and doing business. He lives in Cupertino CA.

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