Ayurvedic Properties
- Taste (Rasa)
- pungent, bitter
- Potency (Virya)
- hot
- Systems
- Digestion, circulation, nervous, urinary, water metabolism
What is Giant Swallowort?
Giant swallowort is one of the most powerful plants in the Ayurvedic pharmacy, and one of the most dangerous. It has a long list of recorded uses, and an equally clear warning: it is poisonous, and should be used only under the guidance of an Ayurvedic specialist.
Its Sanskrit name is Arka (Arka, अर्क), and its botanical name is Calotropis gigantea. Leaves, flowers, root bark and a milky juice are all described in our sources, each with its own uses.
Arka is pungent and bitter in taste and hot in potency. It acts on digestion, circulation, the nervous and urinary systems and water metabolism. If you have come across it in a formula or a recommendation, this page explains what it is and why it demands respect.
Benefits of Giant Swallowort
Arka has a broad recorded range. Its pungent and bitter taste (Katu and Tikta Rasa) and hot potency (Ushna Virya) explain why it stimulates secretion, digestion and expulsion. Every use below assumes specialist supervision, because the plant is poisonous.
Digestion and the Abdomen
It promotes secretion, especially of bile, and acts as an intestinal muscle sedative and antispasmodic. It is recorded for abdominal disorders, dysentery and hemorrhoids, and its flowers are described as a digestive tonic and stomachic.
Lungs and Phlegm
Arka is an expectorant and phlegm purge. It is used for cough, and both the leaves and the flowers are recorded for asthma.
Skin
Skin diseases, including elephantiasis and leprosy, are among its recorded uses. It is also described as a depilatory.
Fevers, Pain and Swelling
It is used for fevers with an enlarged liver and cough, intermittent fevers, pain, edema and difficult or painful urination.
Parasites
Arka is anthelmintic and antiparasitical, used for parasitic infection.
How to Use Giant Swallowort
Arka is used as a paste, a powder or a pill. Our sources give no self-care dose, and they are explicit: use it only with the advice of an Ayurvedic specialist.
| Form | Dose | Best For | When to Take |
|---|---|---|---|
| Paste | Set by a specialist | Skin conditions | As directed |
| Powder | Set by a specialist | Digestive, respiratory and fever complaints | As directed |
| Pill | Set by a specialist | As prescribed | As directed |
Dose matters especially with this plant. Small doses of the flowers are recorded as stimulating the capillaries, while large doses act as an emetic. The milky juice is a violent purgative. No vehicle (Anupana) or seasonal guidance is recorded.
Safety & Side Effects
Our sources are unambiguous: special care must be taken with this herb because it is poisonous. Use it only with the advice of an Ayurvedic specialist.
Key Cautions
- Pregnancy: do not use while pregnant.
- Milky juice: a violent purgative and gastrointestinal irritant.
- Large doses: act as an emetic, causing vomiting.
- Heart: it is recorded as used on the heart like digitalis, which is another reason not to self-prescribe.
Our sources do not list specific drug interactions. Given its heart action, anyone on heart medication should not use it without their doctor and a specialist both involved.
Recommended: Start Here
The best way to start with Arka is not to buy it. It is a poisonous plant whose recorded uses all come with one instruction: use it only with the advice of an Ayurvedic specialist.
If you are curious, the useful first step is understanding it. Read how classical and modern Ayurvedic texts describe poisonous plants, and bring any questions to a qualified practitioner. If a practitioner has prescribed a preparation containing Arka, take it exactly as directed and do not add other Arka products alongside it.
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Safety note: Arka is poisonous, its milky juice is a violent purgative, and it must not be used during pregnancy.
Giant Swallowort vs Other Herbs & Supplements
The most useful comparisons for Arka are between its own parts and doses, since each behaves differently. Each row keeps to what our sources record.
| Comparison | Giant Swallowort | Alternative | Verdict |
|---|---|---|---|
| Flowers vs milky juice | Flowers: digestive tonic and stomachic; small doses stimulate capillaries. | Milky juice: violent purgative and gastrointestinal irritant. | The juice is the harshest part. Neither should be used without a specialist. |
| Leaves vs root bark | Leaves: recorded for paralysis, anesthesia and toxic asthma. | Root bark: alterative. | Different parts, different uses. A specialist chooses the part. |
| Small dose vs large dose | Small doses of the flowers stimulate the capillaries. | Large doses act as an emetic. | Dose decides the effect. This is why self-dosing is unsafe. |
Giant Swallowort for Specific Populations
Because Arka is poisonous, the guidance for every group is caution first.
Pregnancy & Nursing
Do not use while pregnant. Our sources give no guidance for nursing, so avoid it unless a specialist and your doctor both advise otherwise.
Children
No pediatric dose is recorded. Do not give Arka to children.
Elderly
No adjusted dose is recorded. Its heart action, used like digitalis, makes specialist supervision essential, especially alongside other medicines.
Athletes
No performance use is recorded. A poisonous purgative and emetic has no place in a training routine.
Frequently Asked Questions
What is Arka in Ayurveda?
Arka is the Sanskrit name for giant swallowort, Calotropis gigantea. It is a pungent, bitter, hot herb with many recorded uses, and it is poisonous.
Is giant swallowort poisonous?
Yes. Our sources say special care must be taken because it is poisonous, and that it should be used only with the advice of an Ayurvedic specialist.
Can you use Arka during pregnancy?
No. Our sources say not to use it while pregnant.
What is the milky juice of Arka used for?
The milky juice is described as a violent purgative and a gastrointestinal irritant. It is not something to use at home.
What forms is Arka used in?
Paste, powder and pill, each prepared and dosed by a specialist.
Medical Disclaimer: The information on this page is for educational purposes only and is not intended as medical advice. Ayurvedic treatments should be pursued under the guidance of a qualified practitioner (BAMS/MD Ayurveda). Always consult your healthcare provider before starting any new treatment. Content is sourced from classical Ayurvedic texts and may not reflect the latest medical research.