The Compendium of Caraka 6.23.162

6.23.162

bhītamattābaloṣṇakṣuttṛṣārte vardhate viṣam/
viṣaṃ prakṛtikālau ca tulyau &prāpyālpamanyathā//

Venom increases in one frightened, intoxicated, weak, afflicted with heat, hunger, or thirst; / venom [increases] having met constitutional factors and time matching itself; otherwise it is slight.