My same thought process followed for the healing item Roginine on Phantasy Star generation:1. What Sega did to "create" the fictitious energy drink was reverse the A and the Ru of Aruginin (Arginine) and changed the A to an O, thus making Ruoginin. But since Aruginin's official English spelling dropped the U, I thought that Ruoginin should follow suit in its localization, and thus it became Roginine. Did I explain thoroughly? I can try to word it better if you would like.
