What is Requip (Ropinirole)? Requip (Ropinirole) is a dopaminergic agent and it has some of the same effects as dopamine, a naturally occuring chemical found in your body. Low levels of dopamine in the brain are associated with Parkinson’s disease. Only immediate-release Requip is approved to treat either Parkinson symptoms or RLS. Extended-release Requip XL is approved only to treat Parkinson symptoms.