You might want to check to on the oxygen and Cancer Forum s. Also you could read about Oxypowder as a bowelcleanse on their forum Oxypowder .com">http://www. Oxypowder .com
Cancer cells don't like oxygen and that is what oxypowder creates after the bowels are clean the oxygen will be taken up in the rest of the body. The oxygen also helps to build up the good flora in the bowels.
Since oxypowder liquefies fecal matter, he might want to wear some protection till he can judge how soon he needs to go to the bathroom.
I would be careful with mixing herbs and medication.
I would read golfegg's messages on the oxygen and Cancer Forum s, he used ozone for his wife and that might be easier for your father than swallowing a million things.