Another question on doses of CDS for Pancreatic Cancer

My dad has pancreatic cancer, and we are doing the CDS treatment, (5ml with 100ml of water per dose), every fifteen minutes for 2 hours in the morning, and 2 hours at night. 

My dad wants to know if he can take 50ml of water per dose (50ml of water with 3 to 5ml of CDS), instead of 100ml, because he is getting too bloated every time he does the treatment. 
He doesn't mind if the CDS taste is stronger, he just wants to know if reducing the amount of water per dose is safe or not? 

Thanks