This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sedative-Hypnotics and Parkinsonism, Subject name: Pharmacology
Peripheral vasospasm is adverse effect of which drug? 
Select and explain. 
A. Ropinirole, B. Levodopa, C. Bromocriptine, D. Pramipexole
C: Bromocriptine
Answer: C: Bromocriptine 
Explanation: Bromocriptine and pergolide are ergot derivatives and dopamine agonists These are known to cause vasoconstriction and thus gangrene S/E of Pergolide : Valvular hea disease Pramipexole and ropinirole are also dopamine agonists but these are non-ergot derivatives. These do not cause gangrene and are longer acting. S/E of Ropinirole : Nausea, dizziness, hallucinations,postural hypotension.