Ashtangasamgraha 27.24

27.24

jaghanyamadhyapravare tu vegāścatvāra iṣṭā vamane ṣaḍaṣṭau |

daśaiva te dvitriguṇā vireke prasthastathāsyād dvicaturguṇaśca ||

kaṅgusiddhārthakanibhāḥ piṭakāḥ syurarūṃṣikāḥ ||

In emesis, four, six, and eight urges are desired in the lowest, middling, and superior [purification];
in purgation, they are ten, doubled, and tripled, and the quantity [of discharge] is one prastha, doubled, and quadrupled.

Pustules resembling foxtail millet or white mustard seeds are arūṃṣikā.