I'm on Victrels, but have same symptoms, over-tired muscle feeling, but getting muscle cramps less this week, by increasing my water.
I am so busy, during the day, that I make up for getting behind on my water consumption, by drinking it thru-out the night, because my mouth and throat feel dry, and I feel dehydrated- not good!
So, of course, I go to sleep around 11:30, and then start waking up at 3 am 4 am 5 am 6 am..to pee.