2,171
edits
Changes
Jump to navigation
Jump to search
Line 1,920:
Line 1,920: − + − + − + Line 1,936:
Line 1,936: − + − + − + − +
→Vidhi Vimarsha (Applied Inferences)
== Vidhi Vimarsha (Applied Inferences) ==
== Vidhi Vimarsha (Applied Inferences) ==
#Assessment of [[panchamahabhuta]] in a substance can be carried out by taking into consideration, the most conspicuous characteristic of each ''mahabhuta''. For example, ''gandha guna, rasa guna, rupaguna, sparsh guna'' and ''shabd guna'' are chief characteristics of ''prithvi, jala, agni, vayu'' and ''akasha mahabhutas'' respectively. By these organ-specific methods, it becomes easy to assess the ''panchbhutika'' constitution of the substance. Rest of the ''gunas'' given for each ''mahabhuta'' should be clinically evaluated.
#Assessment of [[panchamahabhuta]] in a substance can be carried out by taking into consideration, the most conspicuous characteristic of each [[mahabhuta]]. For example, gandha [[guna]], rasa [[guna]], rupa[[guna]], sparsh [[guna]] and shabda [[guna]] are chief characteristics of [[Prithvi]], [[jala]], [[agni]], [[vayu]] and [[akasha]] [[mahabhutas]] respectively. By these organ-specific methods, it becomes easy to assess the ''panchbhutika'' constitution of the substance. Rest of the [[guna]] given for each [[mahabhuta]] should be clinically evaluated.
#The gustatory effect of the initial, as well as final contact of the drug either in the dry or wet state with the tongue, is known as ''rasa'' or taste. ''Rasa'' is the only principle of drug action which can be directly perceived (''pratyaksha gamya''). This is to be assessed in human volunteers by a single blind method with a performa consisting of chief characteristics of each ''rasa''. As mentioned in [[Charak Samhita]] [Cha.Sa.[[Sutra Sthana]] 26/73-79] sugarcane, milk, and sugar candy are all said to be sweet, but there is an obvious difference in the taste of these substances. So, the intensity of each ''rasa'' can be assessed by taste threshold method. Electronic tongue if developed may help to validate the information about the intensity of ''rasa''.
#The gustatory effect of the initial, as well as final contact of the drug either in the dry or wet state with the tongue, is known as ''rasa'' or taste. ''Rasa'' is the only principle of drug action which can be directly perceived (''pratyaksha gamya''). This is to be assessed in human volunteers by a single blind method with a performa consisting of chief characteristics of each ''rasa''. As mentioned in [[Charak Samhita]] [Cha.Sa.[[Sutra Sthana]] 26/73-79] sugarcane, milk, and sugar candy are all said to be sweet, but there is an obvious difference in the taste of these substances. So, the intensity of each ''rasa'' can be assessed by taste threshold method. Electronic tongue if developed may help to validate the information about the intensity of ''rasa''.
#''Veerya'' and ''vipaka'' are inferred through the activities or final effects (''karma'') produced by intake of drug/diet.
#''Veerya'' and ''vipaka'' are inferred through the activities or final effects (''karma'') produced by intake of drug/diet.
#''Vipaka'' is a pharmacokinetic principle, and its activities are referred at the level of ''koshtha'' (''mutra'' and ''purisha''), ''dhatu'' (''shukra'') and ''doshas''. ''Rasa'' and ''veerya'' are pharmacodynamic principles. Assessment of ''veerya'' and ''vipaka'' are to be evaluated clinically.
#''Vipaka'' is a pharmacokinetic principle, and its activities are referred at the level of ''koshtha'' ([[mutra]] and [[purisha]]), [[dhatu]]([[shukra]]) and [[dosha]]. ''Rasa'' and ''veerya'' are pharmacodynamic principles. Assessment of ''veerya'' and ''vipaka'' are to be evaluated clinically.
#The concept of ''viruddhaahara'' indicates the concepts of incompatibility and allergic reactions. For example, neither honey nor ghee is toxic to the body but if they both taken in equal quantity becomes unwholesome. A combination of it must be subjected to chemical analysis and pharmacological evaluation to assess the adverse effects.
#The concept of ''viruddhaahara'' indicates the concepts of incompatibility and allergic reactions. For example, neither honey nor ghee is toxic to the body but if they both taken in equal quantity becomes unwholesome. A combination of it must be subjected to chemical analysis and pharmacological evaluation to assess the adverse effects.
#Treatment of disease induced by ''viruddhaahara'' includes ''vamana, virechana,'' administration of antagonistic drugs and adaptation of prophylactic measures.
#Treatment of disease induced by ''viruddhaahara'' includes [[vamana]], [[virechana]], administration of antagonistic drugs and adaptation of prophylactic measures.
#The concept of ''prabhava'' clearly indicates the principle which contributes to the specific activity of the drug and is inexplicable in nature. ''Danti'' root which acts as a purgative loses its effectiveness when soaked in water and administered. Observations indicate that ''danti'' has water soluble qualities that contribute to its ability to work as a purgative ref. Once the causative principle is identified, the activity of ''danti'' can be explained in a rational way, and it cannot be quoted as an example of ''prabhava''. In the light of photochemical research, the explanation of drug action becomes rational and the ''prabhava'', a specific principle can be deleted from the list of principles of drug action.
#The concept of ''prabhava'' clearly indicates the principle which contributes to the specific activity of the drug and is inexplicable in nature. ''Danti'' root which acts as a purgative loses its effectiveness when soaked in water and administered. Observations indicate that ''danti'' has water soluble qualities that contribute to its ability to work as a purgative ref. Once the causative principle is identified, the activity of ''danti'' can be explained in a rational way, and it cannot be quoted as an example of ''prabhava''. In the light of photochemical research, the explanation of drug action becomes rational and the ''prabhava'', a specific principle can be deleted from the list of principles of drug action.
Acharya Priya Vrat Sharma has discussed concept of ''rasa'' based on the physicochemical constitution of ''dravyas'' as follows: ''madhura'' (sugar, fat, and amino acids), ''amla'' (acids), ''lavana'' (salts), ''katu'' (essential oils, phenols), ''tikta'' (certain alkaloids and glycosides), and ''kashaya'' (tannins). According to his hypothesis, carbohydrates and proteins are present in ''madhura rasa dravyas''; all the ''amla rasa dravyas'' show acidic properties and all the drugs in ''lavana varga'' contain sodium chloride (NaCl). All the ''dravyas'' of ''katu varga'' contain essential oils while half of all ''katu dravyas'' contain alkaloids or glycosides or phenols. All the ''tikta dravyas'' contain alkaloids, and only 10% of ''dravyas'' contain glycosides. Many of the ''kashaya'' ''rasas'' contain tannin<ref>K. Nishteswar, Basic concepts of ayurvedic pharmacology, Chaukhamba Sanskrit series office, Varanasi,2008,pp:xii </ref>.
Acharya Priya Vrat Sharma has discussed concept of ''rasa'' based on the physicochemical constitution of ''dravyas'' as follows: ''madhura'' (sugar, fat, and amino acids), ''amla'' (acids), ''lavana'' (salts), ''katu'' (essential oils, phenols), ''tikta'' (certain alkaloids and glycosides), and ''kashaya'' (tannins). According to his hypothesis, carbohydrates and proteins are present in ''madhura rasa dravyas''; all the ''amla rasa dravyas'' show acidic properties and all the drugs in ''lavana varga'' contain sodium chloride (NaCl). All the ''dravyas'' of ''katu varga'' contain essential oils while half of all ''katu dravyas'' contain alkaloids or glycosides or phenols. All the ''tikta dravyas'' contain alkaloids, and only 10% of ''dravyas'' contain glycosides. Many of the ''kashaya'' ''rasas'' contain tannin<ref>K. Nishteswar, Basic concepts of ayurvedic pharmacology, Chaukhamba Sanskrit series office, Varanasi,2008,pp:xii </ref>.
==== Guna ====
==== [[Guna]] ====
In recent years, some effort has been made to refine the objective parameters used for assessing ''snigdha-ruksha'' and ''sheeta-ushna gunas'' by employing animal experimentation. Absolute evaluation of one ''guna'' is not possible in a living body since there are infinite factors related to each and every biological event. Metabolic study (''dipana pachana'' experiment), intestinal secretion and motility test, and swimming stress test (swimming induced hypothermia) have been employed to assess the effects of various drugs having ''snigdha-ruksha'' and ''sheeta- ushna gunas''. ''Sheeta'' and ''snigdha guna'' drugs have shown an increase in body weight in metabolic experiments compared to ''ushna'' and ''ruksha guna'' drugs. ''Snigdha guna'' drugs alleviated stress-induced hypothermia whereas ''ruksha guna'' drugs aggravated it<ref>Supriya. S. Balerao A comprehensive study of gunas and evolution of some ojective parameters in the context of snigdha and ruksha gunas Thesis, IPGT&RA, Gujarat Ayurved University, Jamnagar,1998 </ref> <ref>Santosh Mane Evolution and evaluation of some objective parameters for ushna and sita gunas based on panchabhoutik theory and experiments. Thesis,IPGT&RA, Gujarat Ayurved University, Jamnagar,2008. </ref>
In recent years, some effort has been made to refine the objective parameters used for assessing ''snigdha-ruksha'' and ''sheeta-ushna [[guna]] by employing animal experimentation. Absolute evaluation of one [[guna]] is not possible in a living body since there are infinite factors related to each and every biological event. Metabolic study (''dipana pachana'' experiment), intestinal secretion and motility test, and swimming stress test (swimming induced hypothermia) have been employed to assess the effects of various drugs having ''snigdha-ruksha'' and sheeta- ushna [[guna]]. ''Sheeta'' and snigdha [[guna]] drugs have shown an increase in body weight in metabolic experiments compared to ''ushna'' and ruksha [[guna]] drugs. Snigdha [[guna]] drugs alleviated stress-induced hypothermia whereas ruksha [[guna]] drugs aggravated it<ref>Supriya. S. Balerao A comprehensive study of [[guna]] and evolution of some ojective parameters in the context of snigdha and ruksha [[guna]] Thesis, IPGT&RA, Gujarat Ayurved University, Jamnagar,1998 </ref> <ref>Santosh Mane Evolution and evaluation of some objective parameters for ushna and sita [[guna]] based on panchabhoutik theory and experiments. Thesis,IPGT&RA, Gujarat Ayurved University, Jamnagar,2008. </ref>
==== Veerya ====
==== Veerya ====
An attempt has been made to assess the effects of ''sheeta'' and ''ushna veerya'' drugs (''samana pratyayarabdha dravyas'') on basal metabolic rate (BMR). Two ''sheeta veerya'' drugs, namely, ''yashtimadhu'' (Glycyrrhiza glabra) and ''shatavari'' (Asparagus racemosus) and two ''ushna veerya'' drugs, namely, ''chitraka'' (Plumbago zeylanica) and ''jatiphala'' (Myristica fragrans) were considered for this study. In healthy volunteers, initial BMR was recorded with McKesson metabolizer. Then the drug was administered three times a day (''chitraka'' and ''jatiphala'' 2gm each and ''yashtimadhu'' and ''shatavari'' 5gm each). A significant increase (p<0.05) was observed with ''yashti'', while the increase in BMR with ''shatavari'' was not very significant. ''Chitraka'' and ''jatiphala'' brought about a significant decrease in BMR(p<0.05). Therefore, ''sheetaveerya'' and ''ushnaveerya'' drugs which represent the ''saumyatva'' and ''agneyatva'' of a drug or food may be responsible for synthesizing or metabolizing the ''dhatus'' due to their ''santarpaka'' or ''apatarpaka'' actions<ref>K Nishteswar, Basic concepts of ayurvedic pharmacology, Chaukhambha Sanskrit Series office, Varanasi,2009 pp-109-114 </ref>.
An attempt has been made to assess the effects of ''sheeta'' and ''ushna veerya'' drugs (''samana pratyayarabdha dravyas'') on basal metabolic rate (BMR). Two ''sheeta veerya'' drugs, namely, ''yashtimadhu'' (Glycyrrhiza glabra) and ''shatavari'' (Asparagus racemosus) and two ''ushna veerya'' drugs, namely, ''chitraka'' (Plumbago zeylanica) and ''jatiphala'' (Myristica fragrans) were considered for this study. In healthy volunteers, initial BMR was recorded with McKesson metabolizer. Then the drug was administered three times a day (''chitraka'' and ''jatiphala'' 2gm each and ''yashtimadhu'' and ''shatavari'' 5gm each). A significant increase (p<0.05) was observed with ''yashti'', while the increase in BMR with ''shatavari'' was not very significant. ''Chitraka'' and ''jatiphala'' brought about a significant decrease in BMR(p<0.05). Therefore, ''sheetaveerya'' and ''ushnaveerya'' drugs which represent the ''saumyatva'' and ''agneyatva'' of a drug or food may be responsible for synthesizing or metabolizing the [[dhatu]] due to their ''santarpaka'' or ''apatarpaka'' actions<ref>K Nishteswar, Basic concepts of ayurvedic pharmacology, Chaukhambha Sanskrit Series office, Varanasi,2009 pp-109-114 </ref>.
==== Vipaka ====
==== Vipaka ====
An attempt has been made to assess ''vipaka'' of certain drugs by their effect on ''malas'' (feces and urine) and ''doshas'' (''vata, pitta,'' and ''kapha''). Drugs, namely ''bala'' and ''shatavari'' (''madhura vipaka''), ''vrikshamla'' and ''amalaki'' (''amla vipaka'' and ''madhura vipaka''), ''maricha'' and ''pippali'' (''katu vipaka'' and ''madhura vipaka''), ''kushtha'' and ''nimba'' (katu vipaka), and lodhra and Ashoka (katu vipaka) were taken up for the study. The study was done for six days. For the first two days, kapardika bhasma (250 mg., thrice a day) as placebo was administered and from the third day onwards the trial drug, in decoction form, (96 ml, twice a day) was given to healthy volunteers for two days. The remaining two days were used for following up. The influence of these drugs on doshas and malas were assessed using a structured proforma. Madhura and Amla vipaka drugs increased the quantity of urine and stool. Madhura vipaka drugs increased kapha dosha while Amla vipaka drugs increased pitta dosha. Katu vipaka drugs decreased the urine and stool output and increased vata dosha<ref>Naveen H. Dave, Vipaka karmanishtaya Thesis, IPGT&RA, Gujarat Ayurved University, Jamnagar,1998 </ref>.
An attempt has been made to assess ''vipaka'' of certain drugs by their effect on [[mala]] (feces and urine) and [[dosha]] ([[vata]], [[pitta]], and [[kapha]]). Drugs, namely ''bala'' and ''shatavari'' (''madhura vipaka''), ''vrikshamla'' and ''amalaki'' (''amla vipaka'' and ''madhura vipaka''), ''maricha'' and ''pippali'' (''katu vipaka'' and ''madhura vipaka''), ''kushtha'' and ''nimba'' (katu vipaka), and lodhra and Ashoka (katu vipaka) were taken up for the study. The study was done for six days. For the first two days, kapardika bhasma (250 mg., thrice a day) as placebo was administered and from the third day onwards the trial drug, in decoction form, (96 ml, twice a day) was given to healthy volunteers for two days. The remaining two days were used for following up. The influence of these drugs on [[dosha]]and [[mala]] were assessed using a structured proforma. Madhura and Amla vipaka drugs increased the quantity of urine and stool. Madhura vipaka drugs increased [[kapha]] [[dosha]] while Amla vipaka drugs increased [[pitta]] [[dosha]]. Katu vipaka drugs decreased the urine and stool output and increased [[vata]] [[dosha]]<ref>Naveen H. Dave, Vipaka karmanishtaya Thesis, IPGT&RA, Gujarat Ayurved University, Jamnagar,1998 </ref>.
==== Prabhava ====
==== Prabhava ====