Difference between revisions of "Visha, Upavisha & Metals in Ayurveda"
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− | Visha means poison. Visha Chikitsa or Agada Tantra include the treatment of diseases caused by poisons and toxins, such as spoilt food, animal, reptile and insect bites, poisonous minerals, metals and unsuitable food combinations . It is equivalent to toxicology in modern medicine. | + | Visha means [[poison]]. Visha Chikitsa or [[Agada Tantra]] include the treatment of {{Wiki|diseases}} [[caused]] by [[poisons]] and toxins, such as spoilt [[food]], [[animal]], reptile and insect bites, {{Wiki|poisonous}} {{Wiki|minerals}}, metals and unsuitable [[food]] combinations . It is {{Wiki|equivalent}} to {{Wiki|toxicology}} in {{Wiki|modern}} [[medicine]]. |
− | Visha Chikitsa describes the action of harmful elements on body functions and how it can destroy the body tissues. Specific antidotes for poisons were prescribed for nullifying its effects. Ancient texts such as Charaka Samhitha, Susrutha Samhitha and Ashtanga Sangraha offer exhaustive information on this branch of Ayurveda. | + | Visha Chikitsa describes the [[action]] of harmful [[elements]] on [[body]] functions and how it can destroy the [[body]] tissues. Specific [[antidotes]] for [[poisons]] were prescribed for nullifying its effects. [[Ancient]] texts such as [[Charaka]] Samhitha, Susrutha Samhitha and [[Ashtanga]] [[Sangraha]] offer exhaustive [[information]] on this branch of [[Ayurveda]]. |
− | |||
− | |||
− | + | Several [[drugs]] of plant origin have been used to treat various disorders, e.g. {{Wiki|reserpine}}, [[atropine]], etc. by {{Wiki|modern}} system of [[medicine]]. However, many of them were withdrawn or are obsolete due to their toxicity. But [[ancient]] [[science of medicine]] is using all such {{Wiki|substances}} since ages in their crude [[form]] or after proper process of refinement and detoxification called [[shodhana]]. . In addition, [[science]] of [[Ayurveda]] classify many herbal [[drugs]] as [[visha]] ([[poison]]) or upa-visha (moderately {{Wiki|poisonous}}) and also uses them after [[shodhana]] . | |
− | |||
− | + | According to [[Ayurveda]], [[shodhana]] is not only the process of detoxification, but also a process of Samaskara (potentiating the {{Wiki|therapeutic}} efficacy) of such [[drugs]]. It also reduces the side effects. In {{Wiki|modern}} {{Wiki|literature}}, there is not much [[information]] regarding the [[scientific]] validity and rationale in adopting specific [[shodhana]] process for herbal [[drugs]]. There is some [[information]] regarding the [[ancient]] {{Wiki|Chinese}} method of detoxification of some of the herbs like nux-vomica. According to {{Wiki|literature}}, {{Wiki|Chinese}} method of detoxification reduced the toxicity and enhanced the [[potency]] of [[seeds]] of nux- vomica. Further they attributed this to the qualitative and quantitative changes in the phytochemical profile of the [[seeds]] due to detoxification process. | |
− | |||
− | |||
− | + | {{Wiki|Etymologically}}, ‘[[Visha]]’ is that which [[causes]] ‘[[Vishannatva]]’ ({{Wiki|distress}}) and / or [[vishada]] ([[sadness]]) in the [[body]]. Thus ‘[[Visha]]’ has been defined as a [[substance]] which is {{Wiki|destructive}} to [[life]] and possess properties like [[Vyavayi]], [[Vikasi]], [[Ushna]], [[Tikshna]], [[Ruksha]], [[Sukshma]], [[Ashukar]], [[Anirdeshya rasa]] / [[Apaki]] etc.. And the [[drugs]] which possess these properties are called ‘[[Vishas]]’ and those which are less in virulence than ‘[[Vishas]]’ are called ‘[[Upavishas]]’ (sub-poisons). | |
− | + | [[Vedic literature]] explained the mode of {{Wiki|drug}} [[action]] due to [[inherent]] power ([[Veerya]]). | |
− | + | It was long ago when [[Ayurvedic]] fundamentals and its eight clinical features were documented in the [[Ayurvedic]] literatures. | |
− | |||
− | |||
− | + | Initially [[Dravyaguna shastra]] was not mentioned as a separate branch of [[Ayurveda]]. But all the treatises contain elaborate descriptions about the herbs, their properties and indications. [[Charaka]] identified the necessity of complete [[knowledge]] of herbs and their utility in therapeutics. [[Charaka]] opined that a deadly [[poison]] can become a very good [[medicine]] if it is administered properly. | |
− | |||
− | |||
− | |||
− | Various Shodhana procedures are mentioned for visha and Upavisha group of drugs.Out of these, following procedures are common for different ‘Vishopavisha’ drugs. | + | ==[[Classification of Poison]]== |
+ | |||
+ | |||
+ | |||
+ | |||
+ | The {{Wiki|classification}} of [[poison]] is based on certain basic criteria like origin, base, properties, [[potency]] etc. Some of the [[Ayurvedic]] classics and texts in {{Wiki|medieval}} period have classified all the [[poisons]] into two categories as [[Mahavisha]] and Upavisha basing on their toxicity and [[potency]]. | ||
+ | |||
+ | [[Upavisha]] are the group of [[drugs]], which are less toxic in [[nature]] and not so lethal but produce certain toxic symptoms on consumption or administration. The symptoms produced in the [[body]] due to [[Upavisha]] are less toxic, less severe, usually not [[life]] threatening and their toxicity can be controlled by {{Wiki|therapeutic}} measures. | ||
+ | |||
+ | |||
+ | Broadly ‘[[Vishas]]’ are classified into three types viz. [[Sthavara]], [[Jangam]] and [[Kritrima]]. ‘[[Sthavara Vishas]]’ are those which belong to {{Wiki|minerals}} or to group of {{Wiki|poisonous}} herbs, while ‘[[Jangama Vishas]]’ are obtained from the [[animal kingdom]]. The ‘[[Kritrima Vishas]]’ are formed as a result of undesired compounding of [[drugs]]. Among the {{Wiki|poisonous}} herbs- tuberous and / or [[root]] [[poisons]] are more toxic. | ||
+ | |||
+ | In {{Wiki|literature}}, ‘[[Rasarnava]]’ appears to be the first text to mention about ‘[[Visha]]’ ‘[[Upavisha]]’ {{Wiki|classification}}. After ‘[[Rasarnava]]’, ‘[[Rasa Ratnakara]]’, ‘[[Rasendra Chudaman]]i’ and ‘[[Rasa Ratna Samucchaya]]’ have mentioned about five ‘[[Vishas]]’ while other texts like ‘[[Rasendra Chintamani]]’, ‘[[Sarngadhara Samhita]]’, [[Bhava Prakasha]] and [[Ayurveda Prakasha]] have enumerated nine [[dravyas]] as ‘[[Vishas]]’. | ||
+ | |||
+ | The Author of ‘[[Rasatarangini]]’ (20th A D) described only ‘[[Vatsanabha]]’ in ‘[[Visha]]’ group considering its {{Wiki|medicinal}} importance, common availability and frequent use in therapeutics. The other [[drugs]] of {{Wiki|poisonous}} [[nature]] have been included in ‘[[Upavisha]]’ group by this text. | ||
+ | |||
+ | |||
+ | [[Poisons]] in [[Ayurvedic]] {{Wiki|literature}} While reviewing the [[Ayurvedic]] {{Wiki|literature}} for [[visha]], it is found that there is a difference of opinion amongst the authors regarding the inclusion of [[drugs]] in ‘Upavisha’ group. ‘Rasarnava ’ mentioned five [[drugs]] in ‘upavisha group, while ‘Rasaratna Samucchaya’ and ‘Rasendra [[Chintamani]] ’ enumerated seven [[drugs]]; in later texts like ‘[[Ayurveda]] [[Prakasha]]’ and ‘Yogaratnakara’ it is increased to nine while in ‘[[Rasa]] Tarangini it has gone up to eleven. Thus, historically, there seems to be a [[gradual]] increase in the number of {{Wiki|poisonous}} herbs which means more and more [[drugs]] have been [[recognized]] for their {{Wiki|poisonous}} [[nature]] with time. | ||
+ | |||
+ | ‘[[Charaka]]’ ’ in the 23rd [[chapter]] of cikitsasthana has mentioned following ten properties of Vishas, viz – [[Laghu]], Ruksha, [[Ashu]], Vishada, Vyavayi, Tikshna, Vikasi, [[Sukshma]], [[Ushna]] and Anirdeshya [[rasa]]. ‘[[Susruta]]’ in Kalpasthana also reported similar ten properties, but included Avipaki in place of Aniredesya [[rasa]]. [[Acharya]] Sharangdhar listed eight properties of Vishas they are Vyavayi, Vikasi, [[Sukshma]], Chhedi, Madavaha, Agneya, Prananashaka and Yogavahi. | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ==[[Importance of Purification of poison]]== | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | The {{Wiki|poisonous}} [[plants]] reported in [[ancient]] [[scriptures]] of [[Ayurveda]] are still being used widely in a number of {{Wiki|diseases}} after processing with proper [[Shodhana]]. [[Ayurvedic]] physicians successfully employed these [[drugs]] after proper [[Shodhana]]. The {{Wiki|concept}} of [[Shodhana]] was mentioned for the first time in [[Charaka Samhita]] in the context of Danti Dravanti Kalpadhyaya. To reduce the ‘Vikasi’ property of Danti [[root]], [[Charaka]] mentioned it as ‘Samaskara’. | ||
+ | |||
+ | [[Acharya]] [[Vagbhata]] also mentioned [[Shodhana]] of [[drugs]] of plant origin in detail, in the context of Bhallataka [[Rasayana]] for 'Bhallataka’ (Semicarpus anacardium). It is reported that Aconite (Vatsanabha) [[purified]] by {{Wiki|cow}} {{Wiki|urine}} is converted to cardiac stimulant, whereas raw Aconite is cardiac depressant. It is clearly mentioned in ‘[[Bhava]] [[Prakasha]]’ that the bad/toxic effects attributed to ‘Ashodhita Vishas’(unpurified {{Wiki|poisonous}} {{Wiki|substances}}) are minimized when these are used after being subjected to [[Shodhana]] . Hence ‘Vishas’ should be [[essentially]] subjected for [[Shodhana]] before being used in therapeutics. | ||
+ | |||
+ | |||
+ | |||
+ | General Processing of Poisonous {{Wiki|substances}} before consumption. | ||
+ | |||
+ | |||
+ | |||
+ | On Review of [[Ayurvedic]] {{Wiki|literature}} it is observed that | ||
+ | |||
+ | |||
+ | |||
+ | Various [[Shodhana]] procedures are mentioned for [[visha]] and Upavisha group of drugs.Out of these, following procedures are common for different ‘Vishopavisha’ [[drugs]]. | ||
+ | |||
+ | |||
+ | |||
+ | Gomutra Nimajjana: soaking in {{Wiki|cow}} {{Wiki|urine}} for a prescribed period. | ||
+ | |||
+ | |||
+ | Swedana : boiling in different liquids such as {{Wiki|cow}} milk, {{Wiki|goat}} milk, {{Wiki|cow}} {{Wiki|urine}}, vegetable extracts and Kanjika etc. | ||
− | |||
− | |||
Bharjana : frying with or without ghee . | Bharjana : frying with or without ghee . | ||
− | Bhavana : maceration and/ or trituration with vegetable juices. | + | |
+ | [[Bhavana]] : maceration and/ or trituration with vegetable juices. | ||
+ | |||
Nihsnehana : reduction of oily content . | Nihsnehana : reduction of oily content . | ||
− | Kshalana : washing with hot water. | + | |
+ | Kshalana : washing with [[hot]] [[water]]. | ||
+ | |||
Nistvachikarana : is the process of decortications (removal of covering) . | Nistvachikarana : is the process of decortications (removal of covering) . | ||
− | Out of the procedures described above, cow urine and boiling with cow milk are the most common procedures applied for almost all the ‘Vishopavisha’ drugs. | + | |
+ | Out of the procedures described above, {{Wiki|cow}} {{Wiki|urine}} and boiling with {{Wiki|cow}} milk are the most common procedures applied for almost all the ‘Vishopavisha’ [[drugs]]. | ||
+ | |||
SCHEDULE E (1) of THE DRUGS AND COSMETICS ACT, 1940 | SCHEDULE E (1) of THE DRUGS AND COSMETICS ACT, 1940 | ||
− | Provides the List of poisonous substances under the Ayurvedic, Siddha and Unani System of Medicine, which is as follows :- | + | Provides the List of {{Wiki|poisonous}} {{Wiki|substances}} under the [[Ayurvedic]], [[Siddha]] and Unani System of [[Medicine]], which is as follows :- |
+ | |||
+ | |||
+ | |||
+ | ==[[AYURVEDIC SYSTEM]]== | ||
+ | |||
+ | |||
+ | |||
− | + | I [[Drugs]] of vegetable origin | |
− | |||
+ | <poem> | ||
Ahipena- Papaver somniferum Linn. | Ahipena- Papaver somniferum Linn. | ||
− | Arka- Calotropis gigantea (linn.)R. Br. ex. Ait. | + | [[Arka]]- Calotropis gigantea (linn.)R. Br. ex. Ait. |
Bhallataka- Semecarpus anacardium Linn. F. | Bhallataka- Semecarpus anacardium Linn. F. | ||
− | Bhanga Cannabis | + | [[Bhanga]] {{Wiki|Cannabis sativa}} Linn. |
Danti - Baliospermum monatanum Mull. Arg. | Danti - Baliospermum monatanum Mull. Arg. | ||
− | Dhattura - Datura metal Linn.. | + | Dhattura - [[Datura]] metal Linn.. |
Gunja - Abrus precatirius Linn. | Gunja - Abrus precatirius Linn. | ||
− | Jaipala (Jayapala) - Croton tiglium Linn. | + | Jaipala ([[Jayapala]]) - Croton tiglium Linn. |
Karaveera - Nerium indicum Mill. | Karaveera - Nerium indicum Mill. | ||
Langali - Gloriosa superba Linn. | Langali - Gloriosa superba Linn. | ||
Line 77: | Line 128: | ||
Vishamushti - Strychnox nuxvomica Linn. | Vishamushti - Strychnox nuxvomica Linn. | ||
Shringivisha - Aconitum chasmanthum Stapfex Holm. | Shringivisha - Aconitum chasmanthum Stapfex Holm. | ||
− | II Drugs of Animal Origin . | + | </poem> |
+ | |||
+ | |||
+ | II [[Drugs]] of [[Animal]] Origin . | ||
+ | |||
+ | |||
+ | Sarpavisha - {{Wiki|Snake}} [[poison]]. | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | III [[Drugs]] of Mineral Origin | ||
+ | |||
− | |||
− | |||
+ | <poem> | ||
Gauripashana – Arsenic. | Gauripashana – Arsenic. | ||
Hartala - Arseno sulphide. | Hartala - Arseno sulphide. | ||
Manahashila - Arseno sulphide. | Manahashila - Arseno sulphide. | ||
− | Parada – Mercury. | + | Parada – {{Wiki|Mercury}}. |
− | Rasa Karpura - Hydrargyri subchloridum. | + | [[Rasa]] Karpura - Hydrargyri subchloridum. |
− | Tuttha - Copper sulphate. | + | Tuttha - {{Wiki|Copper}} sulphate. |
Hingula – Cinnabar. | Hingula – Cinnabar. | ||
− | Sindura - Red oxide of lead. | + | [[Sindura]] - [[Red]] oxide of lead. |
− | Girisindura - Red oxide of mercury. | + | Girisindura - [[Red]] oxide of {{Wiki|mercury}}. |
− | Dos during consumption of visha | + | Dos during consumption of [[visha]] |
+ | </poem> | ||
+ | |||
+ | |||
+ | {{Wiki|Rice}} prepared with ghee, [[honey]], sugar, {{Wiki|wheat}} is beneficial. Drinks prepared with rock [[salt]], black grapes in cold infusion, staying at cold places, drinking of cold [[water]] and following [[celibacy]]. | ||
+ | |||
+ | |||
+ | Don’ts during consumption of [[visha]] | ||
+ | |||
+ | |||
+ | |||
+ | [[Bitter]], acidic or oily [[food]] [[including]] curd should be avoided. Donot expose to {{Wiki|sun}}. | ||
+ | |||
− | |||
− | + | Visha [[Dravya]] and its Action--On the basis of the [[action]] on various components of [[body]], the probable mode of [[action]] of a [[visha]] [[dravya]] has been described in [[Ayurveda]]. It produces {{Wiki|distress}} of the [[body]] constituents, burning [[sensation]] and {{Wiki|putrefaction}}. Vishada [[guna]], does not have any mucous property and doesn’t stop anywhere in the [[body]], passes through all the [[doshas]], resulting in their vitiation. | |
− | + | In this way, [[visha]] leads to vitiation of all the three [[doshas]] and becomes complicated to treat. Vikasi [[guna]] breaks the bonding between various [[dhatus]] and thereby [[causes]] looseness in [[dhatus]] (dhatushaithilya), resulting in their improper function. [[Activity]] of a [[visha]] [[dravya]] depends on the dominance of [[guna]] possessed by it. For instance, {{Wiki|domination}} of [[ruksha]] [[guna]] will lead to the vitiation of vata, {{Wiki|domination}} of [[sukshma]] [[guna]] lead to vitiation of [[rakta]] [[dhatu]], as compared to others, while {{Wiki|domination}} of tikshna [[guna]] will lead to {{Wiki|impairment}} of three marmas of the [[body]] i.e.shira, [[hridaya]] and basti and may lead to murchha, sanyasa and other symptoms of marmaghata. | |
− | |||
− | Visha Vis a Vis Madya--Classical texts of Ayurveda attributed ten common gunas to both madya and visha, where the intensity of the Guna of visha is more than that of madya. Study of visha gunas is necessary for its treatment. Since the basis of treatment is samanya-vishesha siddhanta, a drug or diet which is opposite in the properties as that of the disease, should be used for its treatment. | + | Visha Vis a Vis Madya--Classical texts of [[Ayurveda]] attributed ten common [[gunas]] to both [[madya]] and [[visha]], where the intensity of the [[Guna]] of [[visha]] is more than that of [[madya]]. Study of [[visha]] [[gunas]] is necessary for its treatment. Since the basis of treatment is samanya-vishesha [[siddhanta]], a {{Wiki|drug}} or [[diet]] which is opposite in the properties as that of the {{Wiki|disease}}, should be used for its treatment. |
Latest revision as of 20:13, 11 February 2020
Visha means poison. Visha Chikitsa or Agada Tantra include the treatment of diseases caused by poisons and toxins, such as spoilt food, animal, reptile and insect bites, poisonous minerals, metals and unsuitable food combinations . It is equivalent to toxicology in modern medicine.
Visha Chikitsa describes the action of harmful elements on body functions and how it can destroy the body tissues. Specific antidotes for poisons were prescribed for nullifying its effects. Ancient texts such as Charaka Samhitha, Susrutha Samhitha and Ashtanga Sangraha offer exhaustive information on this branch of Ayurveda.
Several drugs of plant origin have been used to treat various disorders, e.g. reserpine, atropine, etc. by modern system of medicine. However, many of them were withdrawn or are obsolete due to their toxicity. But ancient science of medicine is using all such substances since ages in their crude form or after proper process of refinement and detoxification called shodhana. . In addition, science of Ayurveda classify many herbal drugs as visha (poison) or upa-visha (moderately poisonous) and also uses them after shodhana .
According to Ayurveda, shodhana is not only the process of detoxification, but also a process of Samaskara (potentiating the therapeutic efficacy) of such drugs. It also reduces the side effects. In modern literature, there is not much information regarding the scientific validity and rationale in adopting specific shodhana process for herbal drugs. There is some information regarding the ancient Chinese method of detoxification of some of the herbs like nux-vomica. According to literature, Chinese method of detoxification reduced the toxicity and enhanced the potency of seeds of nux- vomica. Further they attributed this to the qualitative and quantitative changes in the phytochemical profile of the seeds due to detoxification process.
Etymologically, ‘Visha’ is that which causes ‘Vishannatva’ (distress) and / or vishada (sadness) in the body. Thus ‘Visha’ has been defined as a substance which is destructive to life and possess properties like Vyavayi, Vikasi, Ushna, Tikshna, Ruksha, Sukshma, Ashukar, Anirdeshya rasa / Apaki etc.. And the drugs which possess these properties are called ‘Vishas’ and those which are less in virulence than ‘Vishas’ are called ‘Upavishas’ (sub-poisons).
Vedic literature explained the mode of drug action due to inherent power (Veerya).
It was long ago when Ayurvedic fundamentals and its eight clinical features were documented in the Ayurvedic literatures.
Initially Dravyaguna shastra was not mentioned as a separate branch of Ayurveda. But all the treatises contain elaborate descriptions about the herbs, their properties and indications. Charaka identified the necessity of complete knowledge of herbs and their utility in therapeutics. Charaka opined that a deadly poison can become a very good medicine if it is administered properly.
Classification of Poison
The classification of poison is based on certain basic criteria like origin, base, properties, potency etc. Some of the Ayurvedic classics and texts in medieval period have classified all the poisons into two categories as Mahavisha and Upavisha basing on their toxicity and potency.
Upavisha are the group of drugs, which are less toxic in nature and not so lethal but produce certain toxic symptoms on consumption or administration. The symptoms produced in the body due to Upavisha are less toxic, less severe, usually not life threatening and their toxicity can be controlled by therapeutic measures.
Broadly ‘Vishas’ are classified into three types viz. Sthavara, Jangam and Kritrima. ‘Sthavara Vishas’ are those which belong to minerals or to group of poisonous herbs, while ‘Jangama Vishas’ are obtained from the animal kingdom. The ‘Kritrima Vishas’ are formed as a result of undesired compounding of drugs. Among the poisonous herbs- tuberous and / or root poisons are more toxic.
In literature, ‘Rasarnava’ appears to be the first text to mention about ‘Visha’ ‘Upavisha’ classification. After ‘Rasarnava’, ‘Rasa Ratnakara’, ‘Rasendra Chudamani’ and ‘Rasa Ratna Samucchaya’ have mentioned about five ‘Vishas’ while other texts like ‘Rasendra Chintamani’, ‘Sarngadhara Samhita’, Bhava Prakasha and Ayurveda Prakasha have enumerated nine dravyas as ‘Vishas’.
The Author of ‘Rasatarangini’ (20th A D) described only ‘Vatsanabha’ in ‘Visha’ group considering its medicinal importance, common availability and frequent use in therapeutics. The other drugs of poisonous nature have been included in ‘Upavisha’ group by this text.
Poisons in Ayurvedic literature While reviewing the Ayurvedic literature for visha, it is found that there is a difference of opinion amongst the authors regarding the inclusion of drugs in ‘Upavisha’ group. ‘Rasarnava ’ mentioned five drugs in ‘upavisha group, while ‘Rasaratna Samucchaya’ and ‘Rasendra Chintamani ’ enumerated seven drugs; in later texts like ‘Ayurveda Prakasha’ and ‘Yogaratnakara’ it is increased to nine while in ‘Rasa Tarangini it has gone up to eleven. Thus, historically, there seems to be a gradual increase in the number of poisonous herbs which means more and more drugs have been recognized for their poisonous nature with time.
‘Charaka’ ’ in the 23rd chapter of cikitsasthana has mentioned following ten properties of Vishas, viz – Laghu, Ruksha, Ashu, Vishada, Vyavayi, Tikshna, Vikasi, Sukshma, Ushna and Anirdeshya rasa. ‘Susruta’ in Kalpasthana also reported similar ten properties, but included Avipaki in place of Aniredesya rasa. Acharya Sharangdhar listed eight properties of Vishas they are Vyavayi, Vikasi, Sukshma, Chhedi, Madavaha, Agneya, Prananashaka and Yogavahi.
Importance of Purification of poison
The poisonous plants reported in ancient scriptures of Ayurveda are still being used widely in a number of diseases after processing with proper Shodhana. Ayurvedic physicians successfully employed these drugs after proper Shodhana. The concept of Shodhana was mentioned for the first time in Charaka Samhita in the context of Danti Dravanti Kalpadhyaya. To reduce the ‘Vikasi’ property of Danti root, Charaka mentioned it as ‘Samaskara’.
Acharya Vagbhata also mentioned Shodhana of drugs of plant origin in detail, in the context of Bhallataka Rasayana for 'Bhallataka’ (Semicarpus anacardium). It is reported that Aconite (Vatsanabha) purified by cow urine is converted to cardiac stimulant, whereas raw Aconite is cardiac depressant. It is clearly mentioned in ‘Bhava Prakasha’ that the bad/toxic effects attributed to ‘Ashodhita Vishas’(unpurified poisonous substances) are minimized when these are used after being subjected to Shodhana . Hence ‘Vishas’ should be essentially subjected for Shodhana before being used in therapeutics.
General Processing of Poisonous substances before consumption.
On Review of Ayurvedic literature it is observed that
Various Shodhana procedures are mentioned for visha and Upavisha group of drugs.Out of these, following procedures are common for different ‘Vishopavisha’ drugs.
Gomutra Nimajjana: soaking in cow urine for a prescribed period.
Swedana : boiling in different liquids such as cow milk, goat milk, cow urine, vegetable extracts and Kanjika etc.
Bharjana : frying with or without ghee .
Bhavana : maceration and/ or trituration with vegetable juices.
Nihsnehana : reduction of oily content .
Kshalana : washing with hot water.
Nistvachikarana : is the process of decortications (removal of covering) .
Out of the procedures described above, cow urine and boiling with cow milk are the most common procedures applied for almost all the ‘Vishopavisha’ drugs.
SCHEDULE E (1) of THE DRUGS AND COSMETICS ACT, 1940
Provides the List of poisonous substances under the Ayurvedic, Siddha and Unani System of Medicine, which is as follows :-
AYURVEDIC SYSTEM
I Drugs of vegetable origin
Ahipena- Papaver somniferum Linn.
Arka- Calotropis gigantea (linn.)R. Br. ex. Ait.
Bhallataka- Semecarpus anacardium Linn. F.
Bhanga Cannabis sativa Linn.
Danti - Baliospermum monatanum Mull. Arg.
Dhattura - Datura metal Linn..
Gunja - Abrus precatirius Linn.
Jaipala (Jayapala) - Croton tiglium Linn.
Karaveera - Nerium indicum Mill.
Langali - Gloriosa superba Linn.
Parasika Yavani - Hyoscyamus niger Linn.
Snuhi- Euphorbia neriifolia Linn 13.
Vatsanabha - Acontium chasmanthum StapfexHolm.
Vishamushti - Strychnox nuxvomica Linn.
Shringivisha - Aconitum chasmanthum Stapfex Holm.
III Drugs of Mineral Origin
Gauripashana – Arsenic.
Hartala - Arseno sulphide.
Manahashila - Arseno sulphide.
Parada – Mercury.
Rasa Karpura - Hydrargyri subchloridum.
Tuttha - Copper sulphate.
Hingula – Cinnabar.
Sindura - Red oxide of lead.
Girisindura - Red oxide of mercury.
Dos during consumption of visha
Rice prepared with ghee, honey, sugar, wheat is beneficial. Drinks prepared with rock salt, black grapes in cold infusion, staying at cold places, drinking of cold water and following celibacy.
Don’ts during consumption of visha
Bitter, acidic or oily food including curd should be avoided. Donot expose to sun.
Visha Dravya and its Action--On the basis of the action on various components of body, the probable mode of action of a visha dravya has been described in Ayurveda. It produces distress of the body constituents, burning sensation and putrefaction. Vishada guna, does not have any mucous property and doesn’t stop anywhere in the body, passes through all the doshas, resulting in their vitiation.
In this way, visha leads to vitiation of all the three doshas and becomes complicated to treat. Vikasi guna breaks the bonding between various dhatus and thereby causes looseness in dhatus (dhatushaithilya), resulting in their improper function. Activity of a visha dravya depends on the dominance of guna possessed by it. For instance, domination of ruksha guna will lead to the vitiation of vata, domination of sukshma guna lead to vitiation of rakta dhatu, as compared to others, while domination of tikshna guna will lead to impairment of three marmas of the body i.e.shira, hridaya and basti and may lead to murchha, sanyasa and other symptoms of marmaghata.
Visha Vis a Vis Madya--Classical texts of Ayurveda attributed ten common gunas to both madya and visha, where the intensity of the Guna of visha is more than that of madya. Study of visha gunas is necessary for its treatment. Since the basis of treatment is samanya-vishesha siddhanta, a drug or diet which is opposite in the properties as that of the disease, should be used for its treatment.
Source
https://www.nhp.gov.in/visha-upavisha-metals-in-ayurveda_mtl