N-Isopropylnoratropine (NINA) is primarily utilized in pharmacological research due to its anticholinergic properties. It is often studied for its ability to block muscarinic acetylcholine receptors, making it valuable in understanding the role of these receptors in various physiological processes. Researchers use NINA to explore its effects on the central nervous system, particularly in conditions related to neurotransmitter imbalances. Additionally, it serves as a reference compound in the development of new therapeutic agents targeting disorders like Parkinson's disease, overactive bladder, and other conditions influenced by cholinergic activity. Its structural similarity to atropine also makes it a useful tool in comparative studies to evaluate the efficacy and selectivity of anticholinergic drugs.