You are likely to push yourself beyond safe limits and could end up totally collapsed
in a flare - and we never know
how long or incomplete any given recovery from a flare will be.
I have taken one or the other of these drugs since 2006. It was prescribed for sleep apnea then (three years before my official MS diagnosis) as it is now. It has never made me feel energetic. It simply keeps me from falling flat-on-my-face asleep during the day.