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इष्टवर्णरसस्पर्शगन्धार्थं प्रति चामयम्| अतो विरुद्धवीर्याणां प्रयोग इति निश्चितम्||४६||

The rationality for using viruddha virya (opposite quality drugs or antagonistic) drugs along with main drug are to impart pleasant color, good taste, agreeable smell and touch and relation to the specific disorders.

english translation

iSTavarNarasasparzagandhArthaM prati cAmayam| ato viruddhavIryANAM prayoga iti nizcitam||46||

hk transliteration by Sanscript