The terms proximal (from Latin proximus, meaning 'nearest') and distal (from Latin distare, meaning 'to stand away from') are used to describe parts of a feature that are close to or distant from the main mass of the body, respectively.
But, with Citrucel and/or Metamucil you can start with one teaspoon mixed in water or juice. If you have diarrhea don't use the preparation with artificial sweeteners. Use the one with sugar. I think artificial sweeteners (some of them) might cause more diarrhea.
Metamucil can be of major help to people who have diarrhea and/or constipation. Products such as Metamucil are considered to be regulators and help to make the stool more formed and easier to pass. The aim is to have B.M.s which are totally tubular and the diameter of a quarter. Adding fiber (Metamucil type products) can help to bring this about. For some of us Metamucil creates too much gas. Try some of the other fiber products which might be less gas producing and yet have the same effect.