My reason is driven mainly by the fact the Tartrate is about 1/6th the
cost of the Suc (ER). That said, I wonder if I will not in fact have a more "level" medication concentration taking the 25 mg twice rather than the 50 mg ER once a day. I think there is a good possibility that I'll have a more uniform medication concentration (on average) taking the Tartrate twice a day. Or, I have my doubts about how well a ER holds up over 24 hours.