The answer is: Kaopectane.
Kaopectate is a medication for the treatment of mild diarrhea.
First, kaolinite was used as the adsorbent in this medication. Kaolinite is aa layered silicate mineral, with the chemical composition Alâ‚‚Siâ‚‚Oâ‚…(OH)â‚„.
Now, bismuth subsalicylate is used as the active absorbent in Kaopectate.
Bismuth subsalicylate has the empirical chemical formula of C₇H₅BiO₄.