Slippery Elm Posted on November 15, 2022November 15, 2022 by Mindy Conahye, Reiki Master Practitioner, Cert. Natural Healer Slippery elm is a soothing herb for mucus membranes. It’s commonly used in tincture, capsule, tea, and lozenge form. Only the inner bark is used for medicinal purposes. It may cause mild side effects, such as nausea or skin irritation, for some. TweetFollow usShare this:FacebookXLike this:Like Loading...