Nizonide 500 Medicines to stop diarrhea in adults include loperamide (Imodium), which slows bowel movements, and bismuth subsalicylate (Pepto-Bismol), Nitazoxanide 500 which reduces inflammation and kills bacteria. https://publicpill.com/shop/nizonide-500mg-tablet-nitazoxanide/ https://publicpill.com/shop/nizonide-500mg-tablet-nitazoxanide/