The Compendium of Caraka 8.4.50

8.4.50

snehabastiṃ nirūhaṃ vā naikamevātiśīlayet/
utkleśāgnivadhau snehāgnirūhāt pavanādbhayam//

One should not resort excessively to just a single [type of enema], either unctuous enema or non-unctuous enema;
from unctuous enema comes nausea and destruction of digestive fire, and from non-unctuous enema comes danger from vāta.