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 is a fiber supplement available in many forms from drinkable liquids to capsules to wafers. Metamucil formulas come in original and sugar-free versions. According to the company website, Metamucil is the leading brand of fiber supplements recommended by doctors, pharmacists and gastroenterologists. Metamucil aids in regulating bowel movements by increasing the amount of soluble fiber in the intestines.