Five states of dravya as experienced

dravyo raso guno virya
vipaakah saktireva ca
samvedanakramaadetaah
panjchaavasthaa prakeertitaa

Rasa (tastes), guna (property),virya (potency), vipaaka (taste experienced after digestion) and sakti (action) are five states of dravya as experienced, in that order, during and after consumption

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bhishak

bhaishajyaahaaracheshtaanaam
yo na veti gunaagunam
na sa veti bhishak samyak
svasthaasvasthyahitaahitam

A doctor, who does not know good and bad effects of medicines, food, and routine activities, does not know what could be good and what could be bad for health

That is, a doctor to effectively treat a patient should not only be familiar with medicines but also with other aspects like food and regimen which have impact on health