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.
Without the good bacteria, other microbes can grow out of control and irritate the gut causing diarrhea. Additional medicines that can cause diarrhea include: blood pressure medications, cancer drugs, antacids containing magnesium, NSAIDS, and antiarrhythmia heart medicines. Parasites.