Final answer:
Dopamine agonists like pramipexole and ropinirole, used in the treatment of Parkinsonism, have been linked to sudden sleep attacks as a side effect.
Step-by-step explanation:
The drug that has been associated with sudden sleep attacks in the treatment of Parkinsonism is from a class of medications known as dopamine agonists. These drugs include pramipexole (Mirapex) and ropinirole (Requip), and they are commonly used to treat Parkinson's disease symptoms by stimulating dopamine receptors in the brain. While these medications are effective in managing Parkinson's disease, they have been linked to side effects such as sudden onset of sleep, which can occur without warning, sometimes during activities that require full attention such as driving or operating machinery.