Levodopa, also known as L-DOPA, is a medication primarily used to treat Parkinson's disease and other movement disorders. It serves as a precursor to dopamine, helping to replenish the brain's dwindling supply of this neurotransmitter, which is crucial for coordinating movement. Levodopa is often combined with carbidopa to enhance its effectiveness and reduce side effects. It is considered one of the most effective treatments for managing the symptoms of Parkinson's disease.