Four Medical Tantras

The Four Medical Tantras (Wyl. rgyud bzhi) were compiled by Yuthok Yönten Gönpo in the ninth century and then rediscovered by Drapa Ngönshé in the eleventh century. They are:

1. Root Tantra (rtsa rgyud)
2. Explanatory Tantra (bshad rgyud)
3. Instructional Tantra (man ngag gi rgyud)
4. Subsequent Tantra (phyi ma'i rgyud)