Charak Samhita
आहारमुपयुञ्जानो भिषजा सूपकल्पितम्। यः फलं तस्य नाप्नोति दुर्लभं तस्य जीवितम् ॥८॥
If a diet prepared and administered as per advice of physician, not giving desired effect, the patient hardly survives.
english translation
AhAramupayuJjAno bhiSajA sUpakalpitam। yaH phalaM tasya nApnoti durlabhaM tasya jIvitam ॥8॥
hk transliteration by Sanscript