Keep liquid levels high
The type of food you eat does not really matter that much. The most serious thing is to make sure your fluid intake is high Though many folks do not feel like consuming large amounts of liquids during bouts of diarrhea, many experts agree that increasing you fluid intake is vital to ward off dehydration.
Fluids that contain salt and small amounts of sugar are particularly beneficial, as they help the body replace glucose and minerals lost during diarrhea. A good rehydration fluid can be easily made by adding 1 teaspoon of sugar and pinch of salt to 1 quart of water.
A more complex but tastier mix can be made by adding ½ teaspoon of honey or corn syrup an pinch of table salt to 8 ounces of fruit juice. Stir well and drink often.
For those who do not feel like making anything, Gatorade, comes highly recommended. It contains glucose and electrolytes in sufficient quantities to replace those being lost by your body.

Avoid these foods.
While eating may not be as important as drinking for riding out diarrhea in the best possible shape, there are some foods that should be avoided because of their potentially explosive nature. Obvious ones to pass up include beans, cabbage, and Brussels sprouts.
Other foods containing large amounts of poorly absorbed carbohydrates can aggravate diarrhea. A short list includes bread, pasta and other wheat products, apples, pears, peaches, and prunes, corns, oats, potatoes and processed bran.
And, just in case you were reaching for that carton of ice cream, try to avoid dairy products during a bout of diarrhea. Whether or not milk products caused the problem, they tend to aggrevate diarrhea after you have it.
Avoid the bubble, bubble toilet trouble. Avoid carbonated beverages as well. The gas they contain may add additional explosiveness to a delicate situation

Stay out of the kitchen
While we are still on the subject of food, you or any member of your family who has diarrhea should not prepare food for other members of the household until diarrhea subsides. Also, good hand washing by you and other household members will help keep a parasitic infection from spreading.

If you must take something to stem the tide
Experts insist that letting diarrhea run its course is the best medicine going. If however you absolutely must go someplace and be in control of your bodily functions while there, an over-the-counter product called Imodium, available in capsule ot liquid from. Is probably your best bet for slowing the flow. Imodium is very effective, it works by causing the bowel to tighten up, and by doing so, it prevents things from moving along.

Food remedies not to rely on
Such things as pectin, acidophilus tablets, carob powder, barley, bananas, Swiss cheese, and host of exotic foods, teas, and other folk remedies have been used by some as a treatment for diarrhea. They work behind the bowel and slow the course of the diarrhea.