2 (or 8) Viryas:
- the potency of a drug; that energy by which all substances act;
- a systemic effect; this action is inferential
- known by observing the time from administration to excretion, systemic, stronger than prior categories, these 2 gunas are particularly important to the srotamsi regarding (4) possible defects
- main 2: hot / cold:
a. hot (ushna veerya) = catabolic / kinetic, produces giddiness, thirst, exhaustion, fatigue, sweating, inflammation, accelerated biochemical reactions/digestion and alleviates vata and kapha, promotes dilation of blood vessels, relaxation of muscles, higher BMR / temperature and BP, stool becomes hard or difficult, urine decreases and as does appetite and sleep; acts to accelerate the action of the srotamsi
b. cold (sheetha veerya) = anabolic / creating potential energy; causes cheerfulness and pleasing mind, sustains life, imparts strength sturdiness, steadiness and cleanses blood and decreases pitta, increases sleep and urine, decreases BP and BMR, stool becomes smooth, decreases appetite; acts to decelerate the action of the srotamsi
- 8 veeryas: light/heavy, oily/dry, sharp/soft, hot/cold; these are the only qualities that survive digestion and thus have therapeutic value; oily/dry are significant for purposes of the koshtha (abdomen); the srotamsi are affected by hot /cold; heavy/light affect the dhatus; sharp/soft do not affect the samprapti
- acts on the deposition (sthanasamshray and manifestation (vyakti) stages of sampraptias a category of drug action there is much correspondence with modern notion of stearic structureas a category of drug action there is much correspondence with modern notion of stearic structure
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