Changes

''Rasa, guna, veerya'' and ''vipaka'' are important properties present in a ''dravya''. They can be identified by specific methods. But due to specific arrangements of ''mahabhutas'', which causes specific transformations, a ''dravya'' is possessing unique property termed as ''prabhava''. ''Mahabhutas'' being very subtle and unobservable with our senses, their conjugations or transformations can’t be readily understood. So ''prabhava'' is unexplicable. But it is understood based on the effects produced by it. Drugs can be classified on various parameters, based on ''prabhava'' also various classifications are possible. Here a gross classification based on three most important effects of ''prabhava'' is mentioned.

''Rasa, guna, veerya'' and ''vipaka'' are important properties present in a ''dravya''. They can be identified by specific methods. But due to specific arrangements of ''mahabhutas'', which causes specific transformations, a ''dravya'' is possessing unique property termed as ''prabhava''. ''Mahabhutas'' being very subtle and unobservable with our senses, their conjugations or transformations can’t be readily understood. So ''prabhava'' is unexplicable. But it is understood based on the effects produced by it. Drugs can be classified on various parameters, based on ''prabhava'' also various classifications are possible. Here a gross classification based on three most important effects of ''prabhava'' is mentioned.

* '''''Dosha prashamana'' (''dosha'' pacifying):'''  

* '''Dosha prashamana (dosha pacifying):'''  

''Dosha prashamana'' are the drugs which bring back the equilibrium of ''dosha''. ''Amalaki'' and ''durlabha'' pacify all the three ''dosha'' as well as correct the function of ''dhatu''. ''Amalaki'' pacifies ''vata'' due to ''madhura -amla'' ''rasa'' and ''madhura vipaka'', ''pitta'' due to ''madhura-tikta-kashaya'' , ''rasa'' and ''sheeta veerya'', ''kapha'' due to ''katu''-''tikta –kashaya rasa'' and ''guna'' like ''ruksha, laghu''. This explanation of the mode of action of ''amalaki'' on three doshas is true. But question arises why with the same set of properties, different actions are not possible like vitiation of kapha with ''madhura-amla rasa'', ''madhura vipaka'' and ''sheeta veerya''. So there must be some other factor also influencing the actions. This factor is ''prabhava''. The drugs with ''doshaprashamana prabhava'' always only pacify the ''doshas'' and never vitiate them, whereas the drugs with ''dhatu pradushana prabhava'' always vitiate, never pacify.

''Dosha prashamana'' are the drugs which bring back the equilibrium of ''dosha''. ''Amalaki'' and ''durlabha'' pacify all the three ''dosha'' as well as correct the function of ''dhatu''. ''Amalaki'' pacifies ''vata'' due to ''madhura -amla'' ''rasa'' and ''madhura vipaka'', ''pitta'' due to ''madhura-tikta-kashaya'' , ''rasa'' and ''sheeta veerya'', ''kapha'' due to ''katu''-''tikta –kashaya rasa'' and ''guna'' like ''ruksha, laghu''. This explanation of the mode of action of ''amalaki'' on three doshas is true. But question arises why with the same set of properties, different actions are not possible like vitiation of kapha with ''madhura-amla rasa'', ''madhura vipaka'' and ''sheeta veerya''. So there must be some other factor also influencing the actions. This factor is ''prabhava''. The drugs with ''doshaprashamana prabhava'' always only pacify the ''doshas'' and never vitiate them, whereas the drugs with ''dhatu pradushana prabhava'' always vitiate, never pacify.

* '''''Dhatu pradushana'' (vitiating ''dhatu''):''' There are some substances which by their very nature harm the body e.g. ''mandaka dadhi'' (immature curd/yogurt), slow and acute poisons etc.

* '''Dhatu pradushana (vitiating dhatu):''' There are some substances which by their very nature harm the body e.g. ''mandaka dadhi'' (immature curd/yogurt), slow and acute poisons etc.

* '''''Swasthavrittahita'' (maintaining health):''' The substances which help in maintaining, promotion and preservation of the health of the healthy persons are ''swasthavratta hitakara''.  ''Rasayana'' and ''vajikarana'' as well as daily and seasonal regimens etc. are belonging to this group. Red rice, old rice, wheat, barley, green gram etc are good for daily use to maintain and promote health. The primary function of the substances under this category is to maintain the equilibrium of the ''dosha'' so that they are neither increased/aggravated nor decreased. Thus they help normal functioning of the body.  [verse 67]

* '''Swasthavrittahita (maintaining health):''' The substances which help in maintaining, promotion and preservation of the health of the healthy persons are ''swasthavratta hitakara''.  ''Rasayana'' and ''vajikarana'' as well as daily and seasonal regimens etc. are belonging to this group. Red rice, old rice, wheat, barley, green gram etc are good for daily use to maintain and promote health. The primary function of the substances under this category is to maintain the equilibrium of the ''dosha'' so that they are neither increased/aggravated nor decreased. Thus they help normal functioning of the body.  [verse 67]

* Use of herbal medicines:  

* Use of herbal medicines: