The local hospital has a neurological clinic that treats many patients with Parkinson’s disease.

The local hospital has a neurological clinic yhat treats many patients with Parkinson’s disease. Why might each of the following patients treated this week at the clinic be prescribed a drug other than Sinemet?

a. Patient A has been taking Sinemet for 2 weeks and complains of fainting when getting out of bed, a racing heart, and loss of appetite.
b. Patient B is a self-confessed “health nut” who takes multiple vitamin supplements every day, including all of the B vitamins.
c. Patient C is taking Marplan for depression.