What is the wearing-off phenomenon related to Parkinson's disease?

• A. When PD meds are at maximum doses and the drug loses its effectiveness
• B. When meds become more effective over time
• C. When patient is cured
• D. When disease worsens due to nonadherence

Answer: (A)

Wearing-off is the return of Parkinson’s symptoms as the medication’s effect fades before the next dose. Levodopa temporarily increases brain dopamine, but its short duration means that as levels decline, motor symptoms like slowness, stiffness, and tremor reappear. This time-dependent fluctuation becomes more common as the disease progresses and the brain’s dopamine stores are depleted.

Management focuses on smoothing the effect: giving smaller, more frequent doses or using forms of levodopa that last longer; adding medications that prolong levodopa’s action (like COMT inhibitors) or provide alternative dopamine stimulation (such as MAO-B inhibitors or dopamine agonists); and in some cases using advanced delivery methods. It’s different from peak-dose dyskinesia, which occurs at the time of the strongest medication effect.