system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 72-year-old patient with Parkinsonism presents with swollen feet. They are red, tender and very painful. You could clear up these symptoms within a few days if youtell the patient to stop taking:
assistant
The correct answer is  A characteristic side effect due to local release of CAs resulting in vasoconstriction is livedo reticularis and edema of ankles. Ref KD Tripati 8th ed.