Used in ophthalmology to dilate pupils during eye examinations and to treat certain eye conditions like uveitis. Also employed in cardiology to increase heart rate in patients with symptomatic bradycardia. Acts as an antidote for organophosphate and carbamate poisoning by blocking excessive acetylcholine activity. Utilized in anesthesia to reduce salivary and bronchial secretions before surgery. Sometimes applied in the treatment of poisoning by nerve agents and certain mushrooms containing cholinergic toxins.