Siddha Medicine
Siddha is a Tamil medical tradition of South India and Sri Lanka. This overview explains its ideas, what research shows, metal-product safety and how practice is regulated.
Content last updated . This page has not been medically reviewed.
What Siddha medicine is
Siddha is a traditional medical system of the Tamil-speaking people of South India. A practitioner-authored review describes it as the medicine of the ancient Tamils of peninsular South India. The word Siddha means "established truth," and the Siddhars were the people associated with the school, who recorded their findings in medicine, yoga and astrology in Tamil. [1] India's Ministry of AYUSH says it is also practiced in Sri Lanka, Malaysia and Singapore, where there are sizable Tamil communities. [2]This page is a map of the Siddha part of the library. Each topic below has its own guide. Everything here is information only. It is not a way to diagnose yourself or choose treatment.
Where to go next
| If you want to know about | Read |
|---|---|
| Where Siddha came from and who the Siddhars were | More about Where Siddha came from and who the Siddhars were → |
| The ideas of three humors and the 96 tattuvam | More about The ideas of three humors and the 96 tattuvam → |
| The pressure-point therapy called varmam | More about The pressure-point therapy called varmam → |
| Herbal, mineral and metal medicines and their risks | More about Herbal, mineral and metal medicines and their risks → |
| Colleges, licensing and registration | More about Colleges, licensing and registration → |
| What studies have and have not shown | More about What studies have and have not shown → |
Core ideas, as traditional frameworks
The Ministry of AYUSH dossier describes Siddha as built on 96 principles called tattuvam, with five elements as the basic units of the body and the cosmos. Three "vital life factors" (called vali, azhal and aiyam, or vatham, pittam and kapham) are said to form from combinations of those elements. [2] Diagnosis uses eight methods of examination. [1]These are traditional explanations. They are not biomedical mechanisms, and this site offers no self-diagnostic tools built on them.
Traditional practices
The dossier describes medicines of plant, mineral and animal origin, including compound "herbo-mineral" and mineral preparations. It also describes diet by six tastes, yoga and breathing practices, external therapies, a pressure-manipulation therapy called varmam and a physical manipulation therapy called thokkanam. [2] We do not describe how to prepare any medicine or perform any therapy. Preparing metal-based medicines is a specialist craft and carries real risk.What research shows
Proper evidence not found for Siddha as a whole. We searched PubMed and government and review sources for a comprehensive review of Siddha clinical trials and found none we could read. What exists is narrower:| Question | What we found | Strength |
|---|---|---|
| Two Siddha herbal decoctions added to usual COVID-19 care | One double-blind, placebo-controlled trial of 125 people reported shorter hospital stays; authors are from Siddha research bodies. [3] | Promising but limited |
| Varmam for neck pain | A case series of 10 people with no comparison group. [4] | Insufficient evidence |
| Siddha and other Indian systems for psoriasis | A review of 17 studies found the evidence too uneven to judge effectiveness. [5] | Insufficient evidence |
More detail is in Siddha evidence by use. Practitioner and institutional descriptions make broader claims, such as safe treatment for skin conditions. [1] Treat those as traditional use only until supported by trials you can check.
Who should seek conventional care first
See a clinician first for severe, sudden or worsening symptoms, pregnancy, children, long-term conditions, or if you take prescription medicines. Tell every provider about any Siddha product you take. [9] Read medication interactions and talking with a health professional. If you think someone has swallowed something toxic in the US, call Poison Help at 1-800-222-1222, or 911 for an emergency.Related pages
Unani medicine, Ayurvedic heavy metals and product quality and historical use vs clinical evidence.Frequently asked questions
Is Siddha the same as Ayurveda?
No. Siddha is a separate Tamil tradition with its own texts in Tamil. [1] Indian law groups it with Ayurveda, Unani and Sowa-Rigpa under one national commission. [8]
Has Siddha been proven to work?
Proper evidence not found for Siddha as a whole. Some formulas have small trials, and a 2026 evidence map of Indian-medicine COVID-19 studies said the studies varied too widely to be definitive. [10]
Are Siddha medicines safe?
It depends on the product. Metal poisoning has been reported rarely with Siddha products, and quality testing matters. [7]
Does Siddha treat serious illness like cancer or diabetes?
We found no reliable evidence that it replaces standard care. In the Singapore case, the woman was taking the capsules for their purported anti-cancer effects and was poisoned. [7] Do not stop or delay prescribed treatment.
How do I find a qualified Siddha practitioner?
We do not list practitioners. In India, check licensing under national law. [8] In the United States there is no uniform license; use the credential questions from NCCIH. [9] See how to check a traditional practitioner.
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Product quality and safety
Training and regulation
References
- Thas JJ. Siddha medicine: background and principles and the application for skin diseases. Clinics in Dermatology 2008. PubMed 18280906 (abstract). Read 2026-10-22.
- Ministry of AYUSH, Government of India. Siddha System of Medicine: The Science of Holistic Health (dossier, 2019, hosted by the National Institute of Siddha). Read 2026-10-22.
- Srivastava A and others. Efficacy of two Siddha polyherbal decoctions, Nilavembu Kudineer and Kaba Sura Kudineer, in mild to moderate COVID-19: a double-blind, placebo-controlled trial. Trials 2021 (abstract). Read 2026-10-22.
- Venkatraman M and others. Effect of Siddha varmam therapy in the management of cervical spondylosis: a case series. Bioinformation 2025 (abstract). Read 2026-10-22.
- Dayanand ND and others. Indian traditional treatments for psoriasis: a critical appraisal of available evidence supporting efficacy. Chin J Integr Med 2023 (abstract). Read 2026-10-22.
- National Center for Complementary and Integrative Health (NCCIH, US). Ayurvedic Medicine: In Depth. Read 2026-10-22.
- Tan Z and others. Cerebral edema secondary to heavy metal toxicity from Siddha medicine: a case report and case-based review. Case Reports in Neurological Medicine 2026. Read 2026-10-22.
- Government of India. The National Commission for Indian System of Medicine Act, 2020 (No. 14 of 2020). Read 2026-10-22.
- NCCIH (US). 6 Things To Know When Selecting a Complementary Health Practitioner. Read 2026-10-22.
- Ahmad A and others. Status of evidence on efficacy and safety of Indian traditional medicine (Ayush) for COVID-19: a qualitative review and evidence map synthesis. Syst Rev 2026 (abstract). Read 2026-10-22.