Magnesium sulfate / potassium sulfate / sodium sulfate
"Obviously no one takes this medicine willingly!  That being said I refrigerated both 6oz bottles.  I mixed them with cold water and added a packet of lemonade mix.  The key to getting this down quickly and tastelessly was to use a very wide straw, not the regular ones.  I was able to get each drink down in less than 10 seconds with very little taste.  Trust me, get the widest straw you can find.  It'll make this experience much more tolerable."