smallermediumlarger Previous1 2 3 Next Water Avens Amazing Vitamin D Slideshow Pictures Take the Vitamins Quiz In this Article What other names is Water Avens known by? What is Water Avens? How does Water Avens work? Are there safety concerns? Are there any interactions with medications? Dosing considerations for Water Avens. How does Water Avens work? Water avens contains tannins which can act as astringents. Astringent effects might help reduce diarrhea. Are there safety concerns? It is not known if water avens is safe or what the potential side effects might be.Do not take water avens if:You are pregnant or breast-feeding. Next: Are there any interactions with medications?Previous1 2 3 Next Report Problems to the Food and Drug Administration You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088. Share this Article: Facebook Twitter Email Print STAY INFORMED Get the latest health and medical information delivered direct to your inbox!