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Title: Toxin-Induced Bradycardia with Hypotension

Category: Toxicology

Keywords: bradycardia, hypotension, beta blocker, calcium channel blocker, clonidine (PubMed Search)

Posted: 7/8/2010 by Bryan Hayes, PharmD (Updated: 7/21/2026)

In a patient with toxin-induced bradycardia and hypotension, here is a quick differential to help identify the responsible substance:

  • Beta blockers
  • Calcium channel blockers
  • Cholinergics
  • Clonidine (and other alpha-2 agonists)
  • Digoxin (and other cardiac glycosides)
  • Opioids
  • Sedative hypnotics (such as benzodiazepines and barbiturates)

Less commonly seen causes include: magnesium, propafenone, and plant toxins (aconitine, andromedotoxin, veratrine).


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