Still, there are good gluten-free alternatives—mainly ... There are two main active ingredients in over-the-counter anti-diarrhea medications: loperamide hydrochloride and bismuth subsalicylate.
Loperamide HCl 1mg/7.5mL; mint flavor; contains alcohol 0.5%. Acute: Initially 4mg, then 2mg after each loose stool; max 8mg/day. Stop after 48 hours if ineffective. Chronic: initially 4mg ...