White oval with RPR 202 imprint ## Based on the description provided, I found your pill to be Rilutek (50 mg); also known by the generic name Riluzole. Riluzole is a drug used to treat amyotrophic lateral sclerosis. It delays the onset of ventilator-dependence or tracheostomy in selected patients and may increase survival by approximately 35 months. You can view a detailed description of the drug by clicking on the link below... If you have any more questions or comments to add, please post back so I can further assist you.