What is the muscle‑relaxant of choice for a patient with Parkinson disease who is already receiving levodopa and amantadine?

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Muscle-relaxant for Parkinson disease with existing levodopa and amantadine

Enteral baclofen is recommended as the muscle-relaxant of choice for treatment of generalized spasticity in adults. [1]

Baclofen (oral or enteral baclofen formulations) is recommended as first-line drug treatment for generalized spasticity causing functional impairment, pain, or spasms in adults. [1]