Cramplex contains Corydalis (yan hu suo), Raspberry leaf, Wild Yam, Cramp Bark and Ginger to provide antispasmodic support for smooth muscle.  These herbs have been traditionally used in herbal preparations to provide antispasmodic activity to ease occasional muscular spasms and temporary relieve occasional bowel spasms. Additionally, they have been used to relieve the occasional mild discomfort of menstrual cramps and support healthy bladder and urinary tract smooth muscle.