Vincent, I recently started a thread about dramatic change in my level of fatigue. I can't speak in regards to riluzole as I opted out for the time being.
However, I was given loads of good advice here regarding fatigue and encouraged not to take energy drinks but to rest more instead. I figured if I popped energy drinks, I could continue to push as hard as I have been doing. The irony is that pushing too hard is the major contributor of my relentless fatigue.
I too have problems staying awake in the day. How well do you sleep at night? For some reason, I get woken up every two-three hours every night. Thus, I don't think I'm getting a solid sleep and I am assuming that is tied to my daytime sleepiness.
This past week, I've tried to go to bed an hour and a half earlier. I've been sticking to a precise time, whereas before it was random. I think its helping a bit. I'm still exhausted but have only slept once during the day in the past seven. Food for thought. Wish I had more advice.
We are getting lashed with the tail end of Hurricane Patricia. Are you getting it in Barrie?
Cee xx