That movie is expected to arrive in fall 2015, but in the meantime, we're celebrating Christmas Vacation.. In honor of the holiday classic's 25th anniversary, we're catching up with where the cast is now in the gallery above.
It turns out that the active ingredient in Pepto-Bismol (bismuth subsalicylate) contains a chemical called bismuth. When a small amount of bismuth combines with trace amounts of sulfur, a black-colored substance (bismuth sulfide) is formed.
Quick Answer. Pepto-Bismol sometimes turns stool black when its active ingredient, bismuth subsalicylate, reacts with sulfur in the intestinal tract to form bismuth sulfide. The change in stool color caused by Pepto-Bismol isn't harmful, but a doctor should be consulted if it is accompanied by vomiting, diarrhea or stomach pain, states About.com.