Everyone reacts differently to the parasite cleanse, it's impossible to predict. Avoid paragone, their manufacturing standards aren't totally up to par. Parastroy, Clarkia and Colonix are great products. Colonix gives you fiber and laxative tea so you can cleanse your bowels while killing parasites, which helps keep you feeling good.
For candida people, the Master-Cleanse fast is not the greatest. The constant overdosing on lemon and maple syrup works against them. Too much lemon and the spleen is weakened, and maple syrup feeds the candida. You can substitute the maple syrup with molasses, that will help, but really you shouldn't have more than 1 or 2 drinks a day. Adding Bragg's ACV is also good for candida people -everyone actually.
So if you want to fast, take just one Master-Cleanse drink a day, make the rest of the day veggie broths and teas like peppermint, ginger, chamomile. Feel free to munch on vegetables occasionally. That should keep you strong enough to do the parasite cleanse comfortably.