Levodopa is a medication commonly used to treat Parkinson's disease, a neurological disorder that affects movement. It works by converting into dopamine, a neurotransmitter that is often deficient in people with this condition. By increasing dopamine levels in the brain, levodopa helps improve symptoms such as tremors, stiffness, and difficulty with movement. Levodopa is usually combined with another medication called carbidopa to enhance its effectiveness and reduce side effects. This combination allows more levodopa to reach the brain before being converted to dopamine. While it can significantly improve quality of life, its effectiveness may diminish over time, and patients may experience side effects.