Parkinson's Parkinson's Treatment and Medications 1 — Questions and Answers
Question 1: What is the most effective pharmacological treatment for the motor symptoms of Parkinson's disease?
- Levodopa/carbidopa (Sinemet) (Correct answer)
- Amantadine
- Selegiline
- Rivastigmine
Correct answer: Levodopa/carbidopa (Sinemet)
Levodopa combined with carbidopa (Sinemet) remains the gold standard and most effective treatment for Parkinson's motor symptoms.
Question 2: What is the role of carbidopa when combined with levodopa in Parkinson's treatment?
- Prevents peripheral conversion of levodopa to dopamine (Correct answer)
- Enhances dopamine reuptake
- Blocks dopamine receptors
- Increases levodopa absorption from the gut
Correct answer: Prevents peripheral conversion of levodopa to dopamine
Carbidopa inhibits peripheral dopa decarboxylase, preventing levodopa from being converted to dopamine before it crosses the blood-brain barrier.
Question 3: Which class of medications mimics dopamine by directly stimulating dopamine receptors in Parkinson's treatment?
- Dopamine agonists (Correct answer)
- MAO-B inhibitors
- COMT inhibitors
- Anticholinergics
Correct answer: Dopamine agonists
Dopamine agonists such as pramipexole and ropinirole directly stimulate dopamine receptors and are used as monotherapy or adjunct to levodopa.
Question 4: Dyskinesias in Parkinson's disease treatment refer to:
- Involuntary writhing movements caused by long-term levodopa use (Correct answer)
- Freezing of gait episodes
- Medication-induced tremor
- Muscle cramps from dopamine agonists
Correct answer: Involuntary writhing movements caused by long-term levodopa use
Dyskinesias are involuntary, often choreiform movements that develop as a complication of long-term levodopa therapy in Parkinson's disease.
Question 5: Which surgical treatment for Parkinson's disease involves implanting electrodes in the brain to modulate neural activity?
- Deep brain stimulation (DBS) (Correct answer)
- Pallidotomy
- Thalamotomy
- Focused ultrasound
Correct answer: Deep brain stimulation (DBS)
Deep brain stimulation (DBS) involves surgically implanting electrodes, typically in the subthalamic nucleus or globus pallidus, connected to an implanted pulse generator.
Question 6: MAO-B inhibitors like selegiline and rasagiline work in Parkinson's disease by:
- Slowing the breakdown of dopamine in the brain (Correct answer)
- Increasing dopamine production
- Blocking dopamine reuptake
- Stimulating dopamine receptors
Correct answer: Slowing the breakdown of dopamine in the brain
MAO-B inhibitors prevent monoamine oxidase type B from breaking down dopamine in the brain, thereby increasing available dopamine levels.
Parkinson's Parkinson's Treatment and Medications 1
What is the most effective pharmacological treatment for the motor symptoms of Parkinson's disease?