Charak Samhita
पथ्यैर्मृद्वल्पतां नीतो मृदुदोषकरो भवेत् । पथ्यमप्यश्नतस्तस्माद्यो व्याधिरुपजायते ॥३३०॥
If strong or weak medicament has vitiated the dosha internally, they can be pacified by following wholesome diet. If disease status aggravates even if wholesome diet is followed,then the diet pattern should be changed which may help to inhibit the progression of disease.
english translation
pathyairmRdvalpatAM nIto mRdudoSakaro bhavet । pathyamapyaznatastasmAdyo vyAdhirupajAyate ॥330॥
hk transliteration by Sanscript