Foxglove (Mao Di Huang)
Botanical Name: Digitalis purpurea
The leaves of the foxglove plant are used to extract the constituent, digitalis, used to make the pharmaceutical drug, also called Digitalis, that is used to treat irregular and overly fast heart rates. It was first written about in Ireland and then Scotland where it still grows wild as early as the 13th century. The plant has also been related to witchcraft for centuries. It was used in pagan rituals and potions and long associated with the fairies and breaking their enchantments.
Below is an overview of Foxglove (Mao Di Huang), combining and interpreting the best of Western Science, Traditional Chinese Medicine (TCM), Shamanism, Folklore and more. Gain a balanced and thorough understanding of the healing properties of Foxglove (Mao Di Huang).
Western Name: Foxglove
Also Known As: Witchs Glove, Fairys Glove, Folks Glove, Bloody Fingers, Dead Mans Bells, Fairy Caps, Fairy Thimbles
Key Western Actions & Medicinal Uses: Diuretic, Anti-inflammatory, Improves Blood Circulation, Cardiac Regulator. Irregular heart rate, increase blood pressure, congestive heart failure, edema associated with heart failure, asthma, epilepsy, constipation.
Pin Yin: Mao Di Huang
Also Known As: N/A
Meridians: Heart, Kidney
Key TCM Actions & Medicinal Uses: Tonifies Heart/Promotes Blood Circulation/Increases Urination: congestive heart failure, irregular heart rate, low blood pressure, edema associated with heart failure.
Parts Most Frequently Used: Leaves
Flavors/Temps: Very Bitter, Cold
Caution: The entire plant is toxic, including its roots and seeds. It should never be used in large doses or over a long period of time. Overdose symptoms include nausea, vomiting, wild hallucinations, delirium, severe headaches, tremors, convulsions and possible death.
History/Folklore: The plants name, Digitalis, is also the name of a pharmaceutical drug that is made from the plants constituent, digoxin, a cardiac glycoside. It is used to increase cardiac contractility to help control heart rate, especially in irregular or often fast atrial fibrillation, as is often the case in persons with congestive heart failure. The drug works by inhibiting sodium-potassium ATPase. This causes an increase in intracellular concentrations of sodium ions which then decrease the concentration gradient across the cell membrane. This switches the cell from pumping sodium into itself to pumping calcium out of the cell, this increase in cytoplasmic calcium in turn improves cardiac contractility.
Powdered foxglove leaf is administered in pill form.
Do not confuse what is commonly called Chinese foxglove root (Radix Rehmannia) with foxglove (Digitalis purpurea). They are two entirely different plants.
Foxglove increases the functionality of all forms of muscle tissue, especially the heart and arterioles. It is famous for its ability to improve the circulation of blood. It can also treat internal hemorrhage, inflammatory disorders, acute mania and epileptic cases.
Foxglove is toxic and an overdose can lead to nausea, vomiting, diarrhea and even collapse, tremors and seizures. A frequent side effect of foxglove is reduced appetite leading to weight loss. The drug is a perfect example of a pharmaceutical being derived from a plant that was well known for its effect on the heart.
The constituent digoxigenin is a steroid found exclusively in the flowers and leaves of foxglove. It is used as a molecular probe to detect DNA or RNA.
Early herbalists used the leaves to increase all forms of muscle tissue, but especially muscles of the heart, in order to improve heart rate and raise blood pressure. It can take up to 12 hours for its effects on the heart to be appreciated. Other odd uses included it being used to bind wounds and other conditions that have nothing to do with the plants real properties or benefits. It was also used to treat epilepsy, delirium and acute mania but it remains unclear if the results were real or imagined.
The plant is also a powerful diuretic and has been used effectively to treat dropsy, especially if this condition is associated with heart problems.
Legend says that Vincent Van Gogh used foxglove to treat his epilepsy.
In Roman mythology, depending on the source, either Hera of Juno impregnated themselves without a man by touching foxglove to their bellies and breasts, thus giving birth to either Mars or Vulcan. The plant itself is associated with Saturn or Venus.
In old Scandinavian legends it is said that the fairies taught the foxes to ring foxglove bells to warn each other of approaching hunters.
Dew collected from foxgloves can be used in rituals to communicate with the fairies and the leaves are used to break fairy enchantments. Do not let it touch your skin or inhale the smoke if you burn the leaves .it is toxic. If you want fairies to visit you, plant foxglove, it will attract them to your garden.
Yellow foxglove is not used much medicinally, it is the Wooly foxglove that is the main source of cardiac glycosides having three times the physiological effects as other common foxglove varieties. This does not mean that the common foxglove does not still have a profound tonic effect on the heart.
The normal life cycle of the plant is two years, but they can sometimes take root and throw up flowers for several seasons. The flowers are very popular with honey bees and other small insects, who like to hide out in the blossoms to stay warm and dry on wet chilly evenings. The bottom leaves should always be left behind to allow next years stalks to grow back, never cut it off at the root.
The plants botanical name means finger-like and refers to the ease with which the flowers can be slipped onto a finger, or some say resemble a finger. The name foxglove derives from an old English legend that says foxes must have worn the flowers on their paws to help them move more stealthily through gardens and hen houses. The hillsides where foxes made their dens were often covered with toxic flowers. The other common names, such as witches glove derives from the plants toxicity. An old saying says, foxglove can raise the dead and kill the living.
Cardiac glycosides (including Digitoxin, Digitalin, Digitalein and Digitonin), Steroidal glycosides, Digoxigenin, Volatile oil, Starch, Gum.
The whole plant is extremely toxic, especially for children, cats, dogs, chickens and livestock.
The drug digitalis, made from the constituents in foxglove, is a classic emergency room drug of choice for treating ventricular fibrillation in emergency situations.
Foxglove is a common wildflower in Great Britain, found in woods and along country roads.
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