Charak Samhita
अयोगादतियोगाच्च दशैता व्यापदो मताः। प्रेष्यभैषज्यवैद्यानां वैगुण्यादातुरस्य च॥३०॥
The above complications arise out of either under activity or excessive activity of the drug because of the following: • Preshya-vaigunyam (incompetency of the attendant) • Bhaishajya-vaigunya (incompetency of drug) • Vaidya-vaigunya (incompetency of physician) • Aatura-vaigunya (incompetency of the patient).
english translation
ayogAdatiyogAcca dazaitA vyApado matAH। preSyabhaiSajyavaidyAnAM vaiguNyAdAturasya ca॥30॥
hk transliteration by Sanscript