Hello and thank you for using justanswer. May I ask for how long has this issue been present for you? Do you take any other medications? What specific mental health and medical disorders do you have?
I understand that you take vitamins and excedrin, I just wanted to know if you take any other medications besides the Ritalin. May I ask do you have any mental health or medical diagnoses that I should know about?
You did post this question in the mental health category, so if you have no mental health problems is it possible you may have posted this question in the wrong category? I can ask the moderator to move this question to the neurology category as that may be a better fit. But from a purely mental health aspect, it could be that you are suffering from depression as that can cause the low energy and low motivation. This would also explain why Ritalin was effective for you since it is a Dopamine Agonist medication that can serve as a secondary antidepressant. If this is depression, I would recommend starting on Wellbutrin XL since this medication has Dopamine Agonist properties and will last 24 hours.
Please let me know if you have any other questions or concerns as I would be happy to continue assisting you regarding this issue.