Hi, Writing Regarding My Son; He Has Had Diarrhea For

Hi, writing regarding my son; he has had diarrhea for the past few days, he has a g-tube and he is fed Nutren thru the tube; I spoke with a pharmacist who reccommended Immodium for the diarrhea, and said to continue giving him liquids such as pedialite or Gatorade; I am leary of giving him his Nutren, as I believe it is too hard for his stomach to digest right now, so I was wondering if there is anything you could reccommend that can be given via his t-tube, or do u think the pedialite or Gatorade should suffice for now?