The Compendium of Caraka 6.17.30

6.17.30

ruṇaddhyucchvāsamārgaṃ tu pranaṣṭabalacetasaḥ/
gambhīrā nāma sā tasya hikkā prāṇāntikī matā//
iti gambhīrā hikkā/
vyapetā jāyate hikkā yā 'annapāne caturvidhe/
āhārapariṇāmānte bhūyaśca labhate balam//

and blocks the passage of breath in one whose strength and mind are lost;
that hiccup, named 'deep' (gambhīrā), is considered fatal to him.
Thus ends [the description of] gambhīrā hikkā.
The hiccup known as 'interrupted' (vyapetā) arises after the fourfold food and drink,
and gains strength again at the end of digestion of food.