Madar: Benefits, Uses & Dosage

Madar is a plant to know about rather than one to experiment with at home. It is a tall, striking shrub with thick, fleshy leaves, and in Ayurveda it belongs to the specialist's toolkit for stubborn skin disease, worms and poisoning, not the kitchen shelf.

Its botanical name is Calotropis gigantea (Linn.) R.Br. ex Ait., and in English it is called Giant Milkweed or Gigantic Swallow-wort. Sanskrit names include Alarka, Raktarka and Rajarka, and in Hindi it is known as Lal Madar and Akaua. It grows to about 4-10 feet and is more common in the Himalayan foothills and southern India.

The Bhavaprakash Nighantu treats it as a variety of Madar considered equivalent in properties to its close relative Arka (Calotropis procera). Its taste is pungent and bitter, its qualities light and dry, and its potency heating (Ushna Virya). These are strong, penetrating properties, which is exactly why it is used with care.

One note on colour: our record describes Alarka as the purple or red-flowered type, while the Sahasra Yoga drug index calls it white-flowered. Identification is best left to an experienced practitioner.

The Bhavaprakash Nighantu lists three therapeutic actions (Karma) for Madar, and three classical uses that match them. All of them belong to supervised practice, not self-care.

Skin Disease

Madar is described as anti-dermatosis (Kushtaghna), meaning it counters Kushtha, the broad classical category of chronic skin disease. Its pungent, bitter, dry and heating profile fits the classical approach to clearing these conditions. Read more on our page about skin disorders.

Intestinal Worms

It is also listed as anthelmintic (Krimighna), acting against worms (Krimi). See parasites and worms for how Ayurveda approaches them more broadly.

Poisoning

Finally, the text classifies Madar as anti-toxic (Vishaghna) and names poisoning (Visha) among its uses. This is a traditional classification for practitioners and is never a reason to treat a suspected poisoning yourself; that is a medical emergency.

A Note on the Word Alarka

In the Sushruta Samhita and Ashtanga Hridaya, the word Alarka also means a rabid dog, as in the treatment of poison from a rabid dog's bite. Those passages are about the animal's poison, not about this plant, so they should not be read as uses of Madar.

Our classical sources give no dose, preparation method or vehicle (Anupana) for Madar. That gap matters for a plant this strong, so we are not going to fill it with guesses.

If a classical approach to skin disease or worms interests you, the right step is an appointment with a qualified practitioner, who can decide whether Madar, a prepared formulation or a gentler herb suits you.

Madar is not a gentle herb. Classical Ayurvedic pharmacy groups the Calotropis plants among the sub-poisons (Upavisha), substances that are useful in skilled hands but harmful when misused. Its sharp, heating, drying properties point the same way.

Key Cautions

• Do not take any part of the plant internally without the direct supervision of a qualified Ayurvedic physician.
• The plant has a milky sap; keep it away from your eyes, mouth and broken skin, and wash your hands after touching the plant.
• Do not use it to treat a suspected poisoning or animal bite. Seek emergency medical care.
• Buy only from reputable sources if a practitioner prescribes it, since identification of Calotropis varieties is easily confused.

What Our Sources Do Not Cover

The texts we draw on give no dose, overdose signs, drug interactions or guidance for pregnancy, nursing or children. With a plant of this strength, that silence is a reason for more caution, not less.

If you think someone has swallowed Madar or got its sap in their eyes, contact a poison control centre or emergency services straight away.

Madar is mostly compared with its close relative and confused with an unrelated meaning of its Sanskrit name.

Note that our sources disagree on flower colour: one record gives Alarka purple-red flowers, while the Sahasra Yoga index calls it the white-flowered Calotropis. Botanical identification by an expert matters here.

Our classical sources say nothing specific about Madar for any particular group, and they give no dose at all. For a sub-poisonous plant, that means the default answer for every group is: not without a qualified practitioner.

Pregnancy and Nursing

Classical sources we draw on do not address it. Avoid Madar entirely during pregnancy and nursing unless a qualified physician who knows your case specifically directs otherwise.

Children

Do not give Madar to children. Keep children away from the plant and its milky sap, and seek medical help at once if a child chews any part of it.

Elderly

Older adults should not self-treat with Madar. Its heating, drying, penetrating nature calls for a practitioner's judgement about strength and suitability.

Athletes

Classical sources do not discuss Madar for athletic use, and there is no reason to use it for performance.