Motherwort is a perennial member of the mint family that is
original to Europe and Asia but is now distributed world-wide. The herb
is also commonly known as Lion's Tail and Lion's Ear because of its
appearance, but it is called motherwort because of its long association
with promoting the onset of labor.
The active compounds in motherwort include the alkaloids stachydrine and
leonurine, both of which have an effect on smooth muscle like the heart.
Other constituents in the leaf and flowers include the antioxidant
compounds rutin and quercetin.
While the topical use of motherwort and small doses taken as tea are
safe, tinctures or long-term use of the herb should be supervised be a
qualified health care practitioner. Because this herb increases the risk
of premature uterine contractions, it should not be used during
pregnancy. Similarly, the presence of cardiac agents like leonurine can
interact with prescription medicines or cause complications in people
with heart disease. If in doubt, ask your doctor.
