Laksha in the Charaka and Sushruta Samhita

Laksha is the classical Ayurvedic name for lac, the resin produced by a small scale insect on the branches of certain host trees. Across the classical texts it appears again and again as a substance the tradition returns to for the bones, for bleeding disorders and in the dressing of wounds. What follows sets out how the two great medical Samhitas, and the later Nighantus, class and use it, without reading exact verse numbers into the tradition where the point can be made more plainly.

Laksha in the Charaka Samhita

In the Charaka Samhita, Laksha is treated as a working substance rather than a curiosity. The text groups it in two ways that between them account for much of its later reputation.

First, the tradition counts Laksha among the Sandhaniya drugs, the substances said to unite or knit together. This is the sense that carries through the whole later literature: a drug that helps join what has been broken or torn, whether that is bone or tissue. To be classed as Sandhaniya is to be placed with the substances a physician reaches for when something must be made whole again.

Second, Laksha appears among the substances the text groups for the bones and for Raktapitta, the classical category of bleeding disorders in which blood and Pitta are disturbed together. Its place here sits naturally beside its uniting action: a substance turned to both when structure has to be restored and when bleeding has to be settled. The Charaka Samhita keeps Laksha at this level, as a member of these groups, and it is at that level that the tradition has always read it.

Laksha in the Sushruta Samhita

The Sushruta Samhita is the classical text of the surgical tradition, and it is here that Laksha’s structural role is put to its most practical use. Where Charaka classes the substance, Sushruta sets it to work.

The Sushruta Samhita is the great classical authority on Bhagna, the setting of fractures, and it is in this surgical context that Laksha is used. A broken bone, in the tradition’s understanding, has to be brought back into place and then held and helped to knit, and Laksha belongs to the substances employed in that work of setting. Its standing as a uniting drug, laid down in the wider literature, meets its most concrete application in the management of the fractured bone.

Alongside the bones, the surgical tradition uses Laksha in wound care. The dressing and healing of wounds is central to Sushruta’s craft, and a substance already valued for knitting broken structure has a natural place among the materials applied to a wound as it closes. Here too the guide keeps to how the tradition uses the substance, rather than assigning it to a numbered chapter or verse.

In the Nighantus and later texts

After the two medical Samhitas, the classical understanding of Laksha is carried forward by the Nighantus, the lexicons of Ayurvedic materia medica that record each substance with its names and qualities.

The Bhavaprakasha Nighantu, one of the most widely used of these later works, records Laksha with its synonyms and its properties, fixing in the lexical tradition the qualities the medical texts had put to use. The Raja Nighantu and other lexicons likewise preserve its many Sanskrit names. Through these works the substance passes from the working pages of Charaka and Sushruta into the settled reference literature, where its identity as the lac resin, its uniting nature and its place in the treatment of the bones and of bleeding are recorded together for study.

Good to know

Laksha is insect-derived. It is not a plant part but the resin secreted by a small scale insect on its host trees, which is why it sits a little apart from the herbs and minerals that make up most of the classical materia medica. This origin is worth knowing for anyone reading the tradition or considering the substance, and it is the reason the same material has long been familiar outside medicine as a source of lac and shellac.

This guide describes the classical Ayurvedic understanding and is not medical advice. Speak to a qualified doctor or registered Ayurvedic practitioner before using any herb, especially if you are pregnant, taking medication or managing a health condition.

Frequently asked

What is Laksha in the classical texts? Laksha is the Ayurvedic name for lac, the resin produced by a small scale insect on certain host trees. The classical texts class it among the Sandhaniya or uniting drugs and use it for the bones, for Raktapitta (bleeding disorders) and in wound care.

How does the Charaka Samhita treat Laksha? The Charaka Samhita groups Laksha among the Sandhaniya uniting drugs and among the substances gathered for the bones and for Raktapitta. It is classed at the level of these groups rather than tied to a single named verse.

Why does the Sushruta Samhita use Laksha? As the classical surgical text, the Sushruta Samhita puts Laksha’s uniting nature to practical use in Bhagna, the setting of fractures, and in the dressing and healing of wounds.