From WardWiki - Foundation Doctor Helper
Atropine is a powerful vagolytic that works as an antimucarinic agent. It is given IV for bradycardia and in overdose management for beta blockers. Derivatives are used to manage COPD by a similar mechanism locally on the bronchioles.
IV 500mcg increments up to 3mg for symptomatic bradycardia or bradycardia at high risk of degeneration to asystole. It has now fallen out of favour for asystolic cardaiac arrest; adenaline alone is now used.
Cardiac monitoring must always accompany its use.