Autonomic nervous system mnemonic

Features of atropine (anticholinergic) toxicity

The mnemonic

Hot as a hare, dry as a bone, red as a beet, blind as a bat, mad as a hatter

What each word stands for

  • Hot as a hareHyperthermia from absent sweating
  • Dry as a boneDry mouth and skin
  • Red as a beetFlushed skin
  • Blind as a batMydriasis and blurred vision
  • Mad as a hatterDelirium and agitation

Why it matters clinically

Identifies anticholinergic poisoning, treated with physostigmine in selected cases.

Where it stops being reliable

Does not list tachycardia or urinary retention, and the phrases are descriptive, not quantitative.

Teaching aid, still awaiting independent review. Confirm facts in a standard source.

More mnemonics

Common questions

What is the Autonomic nervous system mnemonic?

Hot as a hare, dry as a bone, red as a beet, blind as a bat, mad as a hatter. It helps you recall: Features of atropine (anticholinergic) toxicity.

What does "Hot as a hare" stand for?

Hyperthermia from absent sweating

What does "Dry as a bone" stand for?

Dry mouth and skin

What does "Red as a beet" stand for?

Flushed skin

What are all the parts of the Hot as a hare, dry as a bone, red as a beet, blind as a bat, mad as a hatter mnemonic?

Hot as a hare: Hyperthermia from absent sweating; Dry as a bone: Dry mouth and skin; Red as a beet: Flushed skin; Blind as a bat: Mydriasis and blurred vision; Mad as a hatter: Delirium and agitation.

Which topic does this mnemonic belong to?

It belongs to Autonomic nervous system in Pharmacology.

Where does this mnemonic stop being reliable?

Does not list tachycardia or urinary retention, and the phrases are descriptive, not quantitative.

How is this useful clinically?

Identifies anticholinergic poisoning, treated with physostigmine in selected cases.

How do I make this mnemonic stick?

Say it aloud, write it from memory tomorrow, then again in a week. Then test yourself on a Pharmacology question about Autonomic nervous system.

Is this a standard mnemonic?

It is a teaching aid written or adapted by our team. Some resemble ones students share informally. Check any fact that matters in a standard source.