Amantadine Query

I was given Amantadine last week as I struggle with fatigue. I am still working full time but find myself wanting to sleep by lunch time. I know some others have said it really helped them but my question is, did it take some time before it became effective. Having taken everyday for just over a week now I feel no different at all and am still struggling.

I know it may not work for all but just wondering if its a time thing

Well innit ironic that a drug meant to help with fatigue, makes it worse!

I did try it some years ago and it caused my already difficult constipation to worsen, so I came off it, before I knew if it helped with fatigue.

Are you on the right dosage? And maybe it needs more than a week to take effect.