The Compendium of Caraka 8.1.16

8.1.16

hṛtpārśvamūrdhendriyamārgaśuddhau tathā laghutve 'api ca lakṣyamāṇe/
duśchardite sphoṭakakoṭhakaṇḍūhṛtkhāviśuddhirgurugātratā ca//

When purity of the heart, flanks, head, and sensory pathways and also lightness are perceived, [emesis is proper]. / In deficient vomiting, there are eruptions, urticaria, itching, lack of purity in the heart and body-cavities, and heaviness of the limbs;