The Four Medical Tantras (rGyud-bzhi), stands as the foundational text of the Tibetan medical tradition. This article examines the historical origins, structural composition, and theoretical framework of The Four Medical Tantras. The treatise, compiled by Yuthok Yonten Gonpo in the twelfth century, synthesizes influences from Indian and Chinese medical traditions while demonstrating substantial original Tibetan contributions. The text is organized into four tantras—Root, Explanatory, Instructional, and Subsequent—comprising 156 chapters and 5,900 verses. Its systematic presentation of physiology, pathology, diagnosis, and therapeutics continues to inform contemporary Tibetan medical practice.

The The Four Medical Tantras represents the culmination of centuries of medical knowledge transmission across Asia and stands as one of the most comprehensive indigenous medical treatises in world history. Since its composition, the text has generated numerous commentaries and remains the core curriculum for Tibetan medical education, requiring practitioners to undertake at least seven years of study to achieve full qualification. This paper provides a scholarly overview of the text's origins, structure, and contributions to medical knowledge.

The The Four Medical Tantras is attributed to Yuthok Yonten Gonpo the Younger (1112–1203), who compiled and synthesized the text in the twelfth century. Scholarly research indicates that the author drew upon multiple sources in composing this work. While earlier Western scholarship primarily recognized Indian medical influences—particularly from the Aṣṭāṅgahṛdayasaṃhitā—recent studies have identified several Tibetan works composed prior to the translation of major Indian texts that directly influenced major sections of the Four Medical Tantras. The text thus represents a creative synthesis of various strands of Asian medicine rather than a simple translation of any single source.

A notable scholarly debate concerns the text's attribution to the Buddha. The Four Medical Tantras is presented as having been expounded by Buddha Śākyamuni in his medical manifestation as Bhaiṣajyaguru, who enters contemplative states and emanates five ṛṣis who serve as narrators. However, the 16th-century physician Zurkharwa Lodro Gyalpo (1509–1579) argued that while earlier tradition held the text to be Buddhist in origin, he came to support the view that The Four Medical Tantras is an original Tibetan treatise. This controversy reflects broader tensions in Tibetan medical historiography between indigenous and Buddhist frameworks of legitimation.

The Root Tantra introduces a sophisticated mnemonic system: the "Medical Tree," which organizes the entire medical system through a branching diagram. Three roots generate nine stems, which branch into forty-seven branches bearing 224 leaves. This visual system enables practitioners to comprehend the entirety of Tibetan medical theory through memorization of a single diagram.

The Four Medical Tantras stands as a monumental achievement in the history of Asian medicine. Its systematic organization of medical knowledge—from fundamental theory through diagnosis to therapeutics—reflects both the medical traditions it synthesized and the creative contributions of its Tibetan compilers. As both a scholarly treatise and a practical clinical manual, the text demonstrates how medical knowledge can be organized and transmitted across generations while maintaining both theoretical coherence and clinical utility. Its enduring authority in Tibetan medicine testifies to the continued relevance of this twelfth-century work for contemporary practice.