Rasarnavasudhakara 2.120

2.120

viṣaṃ tu vatsanābhādyam aṣṭau vegās tad-udbhavāḥ |
kārṣṇyaṃ kampo dāho hikkā phenaś ca kandhara-bhaṅgaḥ | 61
jaḍatā mṛtir iti kathitā kramaśaḥ prathamādyā vegajāś ceṣṭāḥ ||

Poison, however, is of kinds like vatsanābha; eight are the stages arising from it:
blackness, trembling, burning heat, hiccups, foaming at the mouth, breaking of the neck,
stupor, and death; these are declared to be, in order, the actions born from the first and following stages.