The most important function of low concentration of atropine is to relieve skeletal muscle and smooth muscle spasm, have the effect of pain relief and relieve gastrointestinal colic symptoms, also can rescue infection poisoning shock, treat organophosphorus pesticide poisoning, relieve internal organs of colic. It can be used in ophthalmology to dilate the pupil and also regulate nerve paralysis. The most important effect is to treat organophosphorus poisoning, so it is usually used as a special antidote for organophosphorus poisoning together with dephosphoridine. In addition, atropine is an anticholinergic, and can also be used for administration during fundus examination and before general anesthesia. Low concentrations of atropine can be used specifically for anti-arrhythmias, with effects such as relieving sinus tachycardia.