Dried cramp bark is used to treat many kinds of muscle cramps, including menstrual cramps. Take an infusion three times daily, or take ten to thirty drops daily of a one-to one fluid extract. To make an infusion, pour two cups of boiling water over one teaspoon of shredded or ground cramp bark and steep for half an hour. This provides a two-day supply. Take one third of a cup twice daily, and refrigerate the infusion between doses. You can warm it before drinking.