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Kennon Heard, MD, PhD

​University of Colorado School of Medicine

Professor of Emergency Medicine

Chief Section Medical Toxicology and Pharmacology


Contact information

Anschutz Medical Campus
Leprino Building, Campus Box B215
12401 East 17th Avenue

Aurora, CO 80045

Dr. Heard attended medical school at the University of California San Diego. His post-graduate training includes a residency in Emergency Medicine at the Denver Health Medical Center and a Medical Toxicology Fellowship at the Rocky Mountain Poison and Drug Center. He is a fellow of the American College of Emergency Physicians and the American College of Medical Toxicology.
His current positions are Medical Toxicology Fellowship Director at the Rocky Mountain Poison and Drug Center and Section Chief of Medical Toxicology at the University of Colorado School of Medicine where he is a Professor of Emergency Medicine and Medicine. He works and teaches at the University of Colorado Hospital Emergency Department. His research interests include cocaine toxicity, misuse of over-the-counter analgesics, acetaminophen poisoning, and research design. He has authored over 50 papers and 20 book chapters in various areas of Emergency Medicine and Toxicology.
Degree Year ​Focus
California State University, Bakersfield, CA B.S.
​Biology, Magna Cum Laude
University of California San Diego School of Medicine, San Diego, CA M.D. 1993
​Doctor of Medicine
University of California San Diego Medical Center, San Diego, CA 1994 Internal Medicine Internship
​Denver Health and Hospitals, Denver, CO ​1997 ​Emergency Medicine Residency
​Rocky Mountain Poison and Drug Center, Denver, CO ​1997 ​Medical Toxicology Fellowship
​University of Colorado, Denver, CO ​Ph.D. ​2013 ​Clinical Sciences

Funded Projects

  • A Phase 3 trial of equine derived Fab2 for treatment of latrodectism
    Role: Site Investigator
    Funding Agency: Rare Disease Therapeutics
    Funding Period: 2009-


  • The effect of chronic antipsychotic therapy on acute cocaine poisoning  
    Role: Principal Investigator (PI)
    Funding Agency: National Institute on Drug Abuse
    Funding Period: 2006-2011


  • The course of serum transaminase during prolonged actaminophen dosing
    Role: Principal Investigator (PI)
    Funding Agency: McNeil Consumer healthcare
    Funding Period: 2007-2011


  • Characterization of repeated supratherapuetic ingestions of acetaminophen in children: A retrospective poison center study
    Role: Co-Investigator
    Funding Agency: McNeil Consumer Products
    Funding Period: 2006-2010


Other Projects



View All PubMed Publications


Selected Publications (10 out of 177)

  • Heard K, Green JL, Baily JE, Bogdan GM, Dart RC. A randomized trial to determine the change in ALT during 10 days of acetaminophen administration in subjects who consume moderate amounts of alcohol.   Alimentary Pharm Ther. 2007 26:283-290.
  • Heard KJ, Peberdy MA, Sayre MR, Sanders A, Geocadin RG, Dixon SR, Larabee TM, Hiller K, Fiorello A, Paradis NA, O'Neil BJ.  A randomized controlled trial comparing the Arctic Sun to standard cooling for induction of hypothermia after cardiac arrest. Resuscitation. 2010; 81:9-14.
  • The Toxicology Investigator’s Network (K Heard corresponding author). A multicenter comparison of the safety of oral versus intravenous acetylcysteine for treatment of acetaminophen overdose.  Clin Toxicol (Phila). 2010 Jun;48(5):424-30.
  • , Heard KJ.  Clinical course of repeated supratherapeutic ingestion of acetaminophen. Clin Toxicol (Phila). 2011 Feb;49(2):108-12.
  • Heard KJ, Green JL, James LP, Judge BS, Zolot L, Rhyee S, Dart RC. Acetaminophen-cysteine adducts during therapeutic dosing and following overdose. BMC Gastroenterol. 2011 Mar 14;11(1)
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  • Valley MA, Heard KJ, Ginde AA, Lezotte DC, Lowenstein SR. Observational Studies of Patients in the Emergency Department: A Comparison of 4 Sampling Methods. Ann Emerg Med. 2012 Aug;60(2):139-45.e1
  • , Heard KJ. A Characterization of Synthetic Cannabinoid Exposures Reported to the National Poison Data System in 2010. Ann Emerg Med. 2012 Oct;60(4):435-8
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  • art RC, Bogdan G, Heard K, Bartelson BB, Garcia-Ubbelohde W, Bush S, Arnold T, Clark RC, Hendey GW, Holstege C, Spradley EA. A Randomized, Double-Blind, Placebo-Controlled Trial of a Highly Purified Equine F(ab)2 Antibody Black Widow Spider Antivenom.  Ann Emerg Med. 2012 Apr;61(4):458
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  • Wang GS, Roosevelt G, Heard K. Pediatric Marijuana Exposures in a Medical Marijuana State. JAMA Pediatr. 2013 May 27:1-4. doi: 10.1001/jamapediatrics.2013.140.
  • Heard K, Green JL, Anderson V, Bucher-Bartelson B, Dart RC. A randomized, placebo-controlled trial to determine the course of aminotransferase elevation during prolonged acetaminophen administration. BMC Pharmacol Toxicol. 2014 Jul 22;15:39. doi: 10.1186/2050-6511-15-39.
  • Top Toxicologist, ​5280 Magazine, 2009-2014
  • Fellow American College of Emergency Physicians
  • Fellow American College of Clinical Toxicology
  • Fellow American College of Medical Toxicology
  • Clinical Toxicology Editorial Board
  • Associate Editor, Academic Emergency Medicine
  • American College of Clinical Toxicology Board of Trustees