I take Provigil.
Mine are 200 mg tablets in which I break in half.

I would suggest that you half the pill at first, since you are shakey now - it may make me you more shakey.

It really helps me get through the day and in fact - I don't think I would be able to work without it.

I don't experience any side effects from 1/2 tablet at a time. If I take the whole pill, it can make me jittery.

Good luck with it - for some (like me) it is a lifesaver in being able to function and keep going. Not only does it give me more energy - but my thinking is clearer and my memory seems a little better - less foggy.

I try not to take it all the time though - I often don't take any on weekends since I fear my body will get so used to it that it will become ineffective.

Best of louck,
Snoods