My dr has just decided to put me on ritalin, after trying many many other drugs plus ect, for my treatment resistant depression. My question is how quickly will I know if it works? Do I get immediate benefits from it or is it a gradual approach? For example, if I take a tablet at 9am, do I feel more energetic for that morning and then wears off by bedtime? I hope I'm making sence! Thank you for your help.