Cycrimine is a drug used to reduce levels of acetylcholine to return a balance with dopamine in the treatment and management of Parkinson's disease. (en)
Cycrimine binds the muscarinic acetylcholine receptor M1, effectively inhibiting acetylcholine. This decrease in acetylcholine restores the normal dopamine-acetylcholine balance and relieves the symptoms of Parkinson's disease. (en)