Charak Samhita
अपक्वं वमनं दोषं पच्यमानं विरेचनम्। निर्हरेद्वमनस्यातः पाकं न प्रतिपालयेत्॥६२॥
The therapeutic emetic drugs expel undigested dosha without getting digested where as therapeutic purgative drugs expels the dosha during the digestion. That’s why one should not wait for the digestion of emetic drugs.
english translation
apakvaM vamanaM doSaM pacyamAnaM virecanam। nirharedvamanasyAtaH pAkaM na pratipAlayet॥62॥
hk transliteration by Sanscript