Definition: Apoatropine, pronounced "ay-pah-TOH-ronty," is a drug used primarily in treating symptoms such as tremors, nausea, and difficulty swallowing. It works by blocking a neurotransmitter called mu- or gamma-aurogolide receptors found on neurons, leading to the reduction of muscle movement. This medication was initially developed for Parkinson's disease but has since been approved for multiple other uses, including anxiety disorders and respiratory conditions.