<unk>  drugs are sometimes used to treat slow heart rhythms (bradycardias or bradydysrhythmias) caused by myocardial infarctions or other pathologies, as well as to treat conditions that cause bronchioles in the lung to constrict, such as asthma. By blocking the parasympathetic nervous system,<unk>  drugs can increase heart rate in patients with bradycardic heart rhythms, and open up airways and reduce mucous production in patients suffering from asthma.
Parasympatholytic
Abirritant
Neuroskeptic
Toxoid
Hypoallergenic
Endemic 
Sedative
Heteroecious