Gatalin XL is a brand name for a medication primarily used in the treatment of Parkinson's disease and restless legs syndrome (RLS). It contains the active ingredient galantamine, which belongs to a class of medications known as acetylcholinesterase inhibitors. Gatalin XL works by increasing the levels of a neurotransmitter called acetylcholine in the brain, which helps improve the communication between nerve cells. This action can help alleviate some of the symptoms associated with Parkinson's disease, such as movement difficulties, and the discomfort caused by restless legs syndrome. Gatalin XL is formulated as an extended-release capsule, designed to release the medication slowly over time, allowing for once-daily dosing.