Charak Samhita
प्रयोगः शमयेद्व्याधिं योऽन्यमन्यमुदीरयेत् । नासौ विशुद्धः, शुद्धस्तु शमयेद्यो न कोपयेत् ॥२३॥
॥ Ideal therapy without adverse effects॥ A therapy that alleviates one disease condition but provokes another disease is not shuddha (or is an impure or incorrect therapy). The ideal therapy is that which pacifies a disease without provoking any other disease.
english translation
prayogaH zamayedvyAdhiM yo'nyamanyamudIrayet । nAsau vizuddhaH, zuddhastu zamayedyo na kopayet ॥23॥
hk transliteration by Sanscript