Hi Shane, I looked it up for you and found the following:

X Prep tablets or granules should be taken orally with at least a full glass of water. Remember, when taking X Prep or any prescription drug to always follow the label closely. Never take more than directed.
http://www.prescription-drugs-inform...nistering.html

I personally would contact the person who gave you the prep. or your local Pharmacist. If given out by a doctor's surgery, then speak to the receptionist. If it was given by an XRay Dept then phone the radiographer.