Shalakya tantra and Agad tantra

Shalakya tantra(शालाक्य तंत्र):

According to Ayurveda Problem related to ear nose throat and eyes belongs to shalakya tantra. In modern medical science it is known as ENT(otorhinolaryngology).

Agad tantra(अगद तंत्र):

A branch of Ayurveda Medicine science deals with the nature and effects of poisons. Enlisted by plants, metals, and minerals(sthavar vish), by wild animals (jangad vish), produced by mixing two or more different natured herbs and medicines(sanyojak vish) comes under agad tantra.

Reference 

Ajay Jadhav