ATROPINE 

 

Name: ATROPINE 
Classification: Anticholingergic
 
  • Used in the treatment of symptomatic sinus bradycardia (not recommended for bradycardias below AV  node such as Type II 2o, or complete AV block)
  • Antidote for sinus bradycardia induced by drugs or toxic substances or neurological disorders (which may be induced by suctioning)
  • Reduces salivation and excessive secretions of the respiratory tract
  • Antidote for organophosphate or carbamate poisoning
Dose:

For Treatment of Bradycardia

IV Direct

  • 0.5-1mg q3-5min until desired rate achieved

IM/SC

  • 0.4-0.6mg q4-6h prn 

Intratracheal 

  • 2-3 mg prefilled syringe

When used as a cholinergic antidote may require larger and more frequent doses.  See PDAM for other indications

Administration:
  • Slow IV administration may result in paradoxical bradycardia and is not recommended
  • may be given via endotracheal tube if IV administration not possible
Contraindications:
  • Tachycardia 
  • Myasthenia Gravis
  • Acute angle-closure glaucoma
  • Ileus
  • Urinary obstruction
  • Hypersensitivity to atropine or its components
Adverse Effects:
  • Tachycardia, palpitations
  • Dilated pupils; blurred vision
  • Fatigue, delirium, headache, restlessness, ataxia
  • Dry mouth
  • Dry eyes
  • Dry, hot skin
  • Flushed dry skin
  • Ileus, decreased GI Motility
  • Urinary retention and hesitancy
Drug Interactions:
  • atropine + phenothiazines = increased anticholinergic effect
  • atropine + quinidine = increased anticholinergic effect
  • atropine + procainamide = increased anticholinergic effect
Monitoring Therapy:
  • Continuous heart rate and rhythm
  • Blood pressure
Adult Critical Care Protocol:
  • May be administered IV direct by an approved nurse in the CCTC.
  • May be administered as 0.5mg IV direct or intraosseus by medical directive by a certified nurse or RRT in Adult Critical Care for symptomatic bradycardia <60 beats/min and SBP < 90, and at least one sign or symptom (i.e. decreased level of consciousness, signs of shock or myocardial ischemia/pain).

    A certified nurse or RRT may administer additional doses of 1 mg every 3 minutes to a maximum total dose of 3 mg.

 


Lynne Kelly, Pharmacist, CCTC
Brenda Morgan, Clinical Nurse Specialist, CCTC
Last Update: September 19, 2018; Revised: February 13, 2023