Blue Vervain - This herb has traditionally been used to treat various female problems and nervous issues. It is useful, especially in combination with other herbs, for regulating the menstrual cycle, and it also helps with migraine headaches and memory. Vervain is tonic to the heart, liver, spleen, and nervous system, and it is good to rid of worms & parasites as well. Our wild & organic blue vervain is available in 1 ounce packages.