 One part of the autonomic nervous system is the parasympathetic nervous system, and there are medications that are called anticholinergics, and cholinergic always refers to the parasympathetic nervous system. So if we have anticholinergics, they dampen the response of the parasympathetic nervous system. There's hardly ever any reason where we want to increase the response of the parasympathetic nervous system, but because the parasympathetic nervous system work together and they kind of up or down regulate depending on what the body needs, when we want to have more of the sympathetic response, we kind of want to dampen that cholinergic or parasympathetic response. And so reasons that we want to do that might be in bronchospasm to give this anticholinergic to help the patients with the bronchoconstriction and relax the bronchial smooth muscle so that they can breathe easier. Now effects or side effects of anticholinergics always mean that everything slows down and it can dry secretions because we don't really have to focus on the digestive system. It can also cause urinary spasm or urinary retention because again this is part of the elimination of our bodies and it can also cause dry mouth because lack of salivation, dry eyes, as well as motion sickness as it affects the the inner ear. So keep that in mind when you think about anticholinergics and how they affect the parasympathetic nervous system.