The editor says there is no need to tell how rich and important Ugrāditya's work is, since…

The editor says there is no need to tell how rich and important Ugrāditya's work is, since readers will experience it themselves in study, but one is eager to know in what century this benefactor of the world lived, and he discusses this from the materials available. Ugrāditya mentions in this work the medical works of the ācāryas Pūjyapāda, Samantabhadra, Pātrasvāmī, Siddhasena, Daśarathaguru, Meghanātha and Siṁhasena, so he is clearly later than they; all these ācāryas are presumed to have lived before the sixth century.

Why it is kept for review: The author's date (earlier authors he cites).

उग्रादित्य ने प्रकृत ग्रंथ में पूजयपाद, समंतभद्र, पात्रस्वामी, सिद्दसेन, दशरथगुरु, मेघनाथ, सिंहसेन, इन आचायोँ के वैद्यक ग्रंथों का उल्लेख किया है। इससे ये उग्रादित्याचार्य अर्वाचीन हैं यह स्पष्ट है। ये सब आचार्य छटवीं शताब्दी के पहले के होने चाहिए एेसा अनुमान किया जाता है।