 The Secret Quintessential Instructions on the Eight Branches of the Ambrosia Essence Tantra or The Four Tantras
This is a collection of four tantras which comprise the basis of Traditional Tibetan Medicine.It is divided into the "Root Tantra" ("rtsa rgyud"), "The Explanatory Tantra" ("bshe rgyud"), "The Oral-instruction Tantra" ("man ngag rgyud"), and "The Subsequent Tantra" ("phyi ma rgyud").The "Root Tantra" has six chapters and gives (1) an introduction, (2) general outline of topics, (3) the basis of disease, (4) diagnosis, (5) methods of treatment, and (6) an enumeration of the metaphors used in Traditional Tibetan Medicine.