Lily of the Valley, aka Convallaria Majalis, is used for heart problems including heart failure and irregular heartbeat. It is also used for urinary tract infections (UTIs,) kidney stones, weak contractions in labor, epilepsy, fluid retention (edema,) strokes, and resulting paralysis, eye infections (conjunctivitis,) and leprosy. Lily of the Valley affects the heart rate, enabling it to function more regularly and efficiently, reducing excessive irritability of the myocardium without increasing the amount of oxygen required by the heart muscle.