LAISHA · DRAVYAGUNA

Tamra

ताम्र

Elemental copper, Cu. Tamra bhasma is chiefly copper oxides and sulphide.

Parthiva · mineral origin · Dhatu

SHODHANA — NO MINERAL DRAVYA IS USED RAW

Heated and quenched in the five liquids, then a further samanya and vishesha shodhana. Tamra is the metal the texts warn about most: improperly prepared tamra bhasma is explicitly named as causing its own set of disorders.

Benefits & side effects

TRADITIONAL VIEW, WITH SAFETY LIMITS

Hindi name: Tamba

What the texts say Tamra does

What the evidence says. Copper's physiology and toxicology are established. The classical preparation has not been shown safe or effective by modern study.

Side effects and limits

Copper in excess causes vomiting, liver injury and haemolysis, and free copper is precisely what an incomplete marana leaves. Wilson's disease is an absolute contraindication.

Avoid or ask first: Wilson's disease and any copper-handling disorder.; Improperly prepared bhasma, absolutely.; Hepatic impairment.

A traditional classification, not a recommendation. The full safety record is below.

Stands in 1 group

A Samhita can only be read forwards, from the group to its members. This is the same list read backwards.

Matra and anupana

AS THE CLASSICAL TEXTS AND THE API PRESCRIBE

Bhasma15–60 mg
AnupanaMadhu · Ghrita
KalaAdhobhakta

The smallest matra of the common dhatu after swarna, and deliberately so. The texts name eight doshas of ashuddha tamra including vomiting, burning and loss of consciousness.

Reported from Sharangadhara Samhita and the Ayurvedic Pharmacopoeia of India. Laisha states what the texts prescribe; it does not recommend. No quantity here is adjusted for a particular person — not for agni, koshtha, bala, age, pregnancy, kidney or liver function, or anything already being taken.

Rasapanchaka

Rasa
KashayaMadhuraTikta
Guna
LaghuRuksha
ViryaUshna
VipakaKatu
DoshakarmaKaphapittahara.

Karma and part used

LekhanaYakriduttejakaKrimighnaMedohara
Upayukta angaTamra bhasma

Paryaya

ShulvaUdumbaraRavipriyaMlechchha mukha

Tamra is classed among the Dhatu.

Names, by language

EnglishCopper
HindiTamba
KannadaTamra

Classical references

Rasa Ratna Samuccaya
Chapter 5
Tamra among the dhatu, with the eight doshas of improperly prepared tamra.
Rasa Tarangini
Taranga 17
Tamra shodhana, marana and the consequences of ashuddha tamra.

Rasa, guna, virya, vipaka and karma are recorded as the classical texts give them, with the text and section named so a student can open the book and check.

Adulterants and substitutes

Brass and bronze are sold as tamra. More seriously, an incompletely marana'd tamra bhasma retains free copper and is the classical example of a bhasma that harms.

Identity

Elemental copper, Cu. Tamra bhasma is chiefly copper oxides and sulphide.

A WAY TO REMEMBER IT

Tamra means dark red or coppery — the metal named for its colour, and the same root gives tamarind its Sanskrit name through the colour of the pulp. Cuprum, from Cyprus, gives the symbol Cu.

What the tradition holds

Tamra bhasma is used in yakrit vikara, in medoroga and in krimi, and Arogyavardhini vati is its best-known yoga.

Constituents. Elemental copper, Cu. Tamra bhasma is chiefly copper oxides and sulphide.

What the evidence says

StatusCopper's physiology and toxicology are established. The classical preparation has not been shown safe or effective by modern study.
The honest gapMineral and animal dravya are far less studied than plant dravya, and what study exists is chiefly characterisation and toxicology rather than clinical efficacy.

Safety

Copper in excess causes vomiting, liver injury and haemolysis, and free copper is precisely what an incomplete marana leaves. Wilson's disease is an absolute contraindication.

ContraindicationsWilson's disease and any copper-handling disorder.
Improperly prepared bhasma, absolutely.
Hepatic impairment.
InteractionsPenicillamine and zinc — the treatments for copper overload; tamra opposes them directly.
Oral zinc supplements — mutual interference in absorption.
Any hepatotoxic drug — additive burden on a liver already handling copper.
Pregnancy and breastfeedingNot established as safe. Avoid.

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What this is not

Sources

Rasa Ratna Samuccaya and Rasa Tarangini
National Institute of Indian Medical Heritage
The classical Rasashastra position: which group the dravya belongs to, its shodhana and marana, and the matra of the prepared form.
https://niimh.nic.in/ebooks/
Ayurvedic Pharmacopoeia of India
Pharmacopoeia Commission for Indian Medicine and Homoeopathy, Ministry of Ayush, Government of India
The official Indian pharmacopoeial standing of the dravya and the identity of the prepared article.
https://pcimh.gov.in/
Classical matra by dose form
Sharangadhara Samhita, Madhyama Khanda
The classical quantity for each dose form, as the standard reference gives it.
https://niimh.nic.in/ebooks/esharangadhara/
Mineral fact sheets
National Institutes of Health Office of Dietary Supplements
The established physiology of the element, its upper intake level and its documented interactions with medicines.
https://ods.od.nih.gov/factsheets/list-all/
Lead, mercury and arsenic in Ayurvedic medications
Centers for Disease Control and Prevention (CDC)
The documented poisonings from Ayurvedic preparations containing heavy metals, reported by a health authority outside India.
https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5326a3.htm
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