Ayurveda — Theory and Framework
Ayurveda (āyurveda — from Sanskrit āyus "life" + veda "knowledge") is the traditional medical system of India, considered one of the world's oldest comprehensive systems of medicine. Its roots lie in the Atharva Veda (c. 1200–1000 BCE), which contains hymns for healing disease and warding off evil. The systematised Ayurvedic tradition is usually dated to approximately 800 BCE – 200 CE.
The theoretical foundation of Ayurveda rests on the Panchamahabhuta (five great elements — earth/prithvi, water/jala, fire/agni, air/vayu, space/akasha) and the Tridosha theory: the three bodily humours of Vata (air-movement principle), Pitta (fire-digestive principle), and Kapha (water-structural principle). Health is a state of equilibrium among the three doshas; disease arises from imbalance. Treatment aims to restore this balance through diet, herbal medicine (aushadhi), detoxification (panchakarma), and lifestyle modification.
Ayurveda recognises eight specialisations (ashtanga): Kaya chikitsa (internal medicine), Kaumara Bhritya (paediatrics/obstetrics), Shalya (surgery), Shalakya (ENT/ophthalmology), Agada tantra (toxicology), Bhuta vidya (psychiatry/spirit medicine), Rasayana (rejuvenation therapy), and Vajikarana (reproductive medicine). Dhanvantari is the mythological divine physician and patron deity of Ayurveda — his image is used as the logo of the Ministry of AYUSH. National Ayurveda Day is celebrated on Dhanvantari Trayodashi (Dhanteras), in October/November.
Charaka Samhita — Father of Indian Medicine
Charaka is traditionally identified as a court physician of the Kushana king Kanishka I (c. 1st–2nd century CE) and is called the "Father of Indian Medicine" (Acharya Charaka). However, the Charaka Samhita text is not purely his work — it is a revision by Dridhabala (c. 9th century CE) of an even earlier text by Agnivesha (a pupil of the sage Atreya of Takshashila), which was itself based on much older oral traditions. The text as we have it contains material from multiple centuries.
The Charaka Samhita is primarily a treatise on internal medicine (kaya chikitsa). It has 8 sthanas (divisions) and 120 adhyayas (chapters). Its major themes include: the tridosha theory; detailed pharmacology (hundreds of plants, their properties and preparations); physiology and anatomy (though not from dissection); diagnosis by eight methods (Ashtavidha Pariksha — examining pulse, urine, faeces, tongue, sound, eyes, skin, and body build); the physician's role and ethics; and the concept of preventive medicine and healthy lifestyle.
Among Charaka's remarkable insights: he understood that the heart is the seat of consciousness and emotion (he called it the hridaya — source of the body's vital functions); he described genetic transmission of disease; he noted 13 types of agni (digestive fires); and he gave a theory of seed-and-soil (bija and kshetra) for disease causation that anticipates germ theory.
Sushruta Samhita — Father of Surgery
Sushruta is called the "Father of Surgery" and is the father of plastic surgery. He is traditionally said to have lived in Kashi (Varanasi) and to have been a disciple of the sage Dhanvantari (the divine physician). The date of the original Sushruta is debated — some scholars place him in the 6th century BCE; the text as we have it is generally dated to the 3rd–4th century CE; it was later revised by Nagarjuna (a different Nagarjuna from the philosopher).
The Sushruta Samhita is the primary ancient text on surgery (shalya tantra). It has 6 sthanas and 184 chapters. Its most famous contribution is the description of rhinoplasty — the surgical reconstruction of a nose using a pedicle flap of skin from the cheek or forehead. This was not merely theoretical — nose amputation was a common punishment in ancient India, so surgeons were in demand. Sushruta's rhinoplasty technique was documented in the Gentleman's Magazine of London in 1794 (based on an operation observed in Pune), and this Indian technique directly influenced the development of plastic surgery in Europe.
The Sushruta Samhita describes 120 surgical instruments — classified into sharp (shastra) and blunt (yantra) types; 300+ surgical procedures; 8 types of surgical incisions; wound management, drainage and suturing; bone-setting and treatment of fractures; couching of cataracts; and dissection of cadavers for anatomical study (the only ancient Indian text to describe dissection).
Vagbhata and Other Medical Traditions
Vagbhata (c. 7th century CE) wrote the Ashtanga Hridayam ("Heart of the Eight Limbs") — a comprehensive synthesis of the Charaka and Sushruta traditions into a single accessible text. It became the most widely read Ayurvedic text and was translated into Tibetan, Arabic, and Persian. Vagbhata was from Sind (modern Sindh region) and was influenced by both Hindu and Buddhist medical traditions.
Madhava Nidana (c. 7th–8th century CE) by Madhavakara is a definitive text on diagnosis — the identification of 69 categories of disease with their symptoms.
Indian medicine also developed specialised traditions beyond Ayurveda: Siddha medicine (Tamil Nadu — based on 18 Siddha saints including Agastya; emphasises minerals and metals; closely related to alchemy/rasayana); Unani medicine (introduced to India by Greco-Arabic physicians through the Mughal courts; based on Galenic humoral theory; major centre: Hyderabad under the Nizams).
Nagarjuna (10th–11th century CE alchemist, different from the Buddhist philosopher) contributed to rasashastra (chemistry/alchemy): the preparation of bhasmas (calcined metal powders used medicinally — gold, silver, iron, mercury bhasmas); extraction and purification of mercury. Rasashastra is a sophisticated pharmaceutical chemistry tradition that allowed medicines of extreme potency to be prepared.
Medical Education and Hospitals in Ancient India
Ancient India had sophisticated medical education institutions. Takshashila (near Rawalpindi, modern Pakistan) was the first great centre of medical learning — the Atreya school, where the original compilation that became the Charaka Samhita was produced, was associated with Takshashila. Nalanda also had a medical curriculum alongside its Buddhist philosophy focus.
Emperor Ashoka (r. 268–232 BCE) is recorded in his Rock Edicts as establishing hospitals for both humans and animals (dvi-pada pashu cikitsa) throughout his empire and in neighbouring kingdoms — this is one of the earliest records of state-sponsored medical care anywhere in the world. He also planted medicinal herb gardens along roads.
The Chinese traveller Xuanzang (7th century CE) describes well-organised hospitals and free medical care available to the poor and travellers in Harsha's empire. The Gupta period (4th–6th century CE) is generally regarded as the golden age of Indian medical practice — when both the Charaka and Sushruta traditions were at their peak of activity.
Major Ancient Indian Medical Texts
| Text | Author | Period | Focus | Key Content |
|---|---|---|---|---|
| Charaka Samhita | Agnivesha (orig.) → Charaka (revised) → Dridhabala (c. 9th c.) | c. 300 BCE – 9th c. CE | Internal medicine (kaya chikitsa) | Tridosha theory; pharmacology; 8-fold diagnosis; preventive medicine |
| Sushruta Samhita | Sushruta → Nagarjuna (revised) | c. 3rd–4th c. CE (text) | Surgery (shalya tantra) | Rhinoplasty; 120 instruments; 300 procedures; dissection; cataract couching |
| Ashtanga Hridayam | Vagbhata | c. 7th c. CE | Synthesis of all 8 branches | Most widely read Ayurvedic text; translated into Tibetan and Arabic |
| Madhava Nidana | Madhavakara | c. 7th–8th c. CE | Diagnosis (Nidana) | 69 disease categories; symptomatology; differential diagnosis |
| Rasaratnakara | Nagarjuna (the alchemist) | c. 10th–11th c. CE | Rasashastra (chemistry) | Mercury preparation; metal bhasmas; pharmaceutical chemistry |
| Charaka-Dridhabala | Dridhabala | c. 9th c. CE | Reconstructed Charaka text | Completed the missing 17 chapters of original Charaka Samhita |
Previous Year Questions
Which of the following statements about Sushruta Samhita is/are correct?
1. It describes rhinoplasty as a surgical procedure using a skin flap from the cheek or forehead.
2. It was primarily a text on internal medicine and did not deal with surgical instruments.
3. It was later revised by an alchemist named Nagarjuna.
(a) 1 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3
Answer: (b) 1 and 3 only
Statement 2 is wrong: The Sushruta Samhita is PRIMARILY a text on surgery — it describes 120 surgical instruments and 300 procedures. Internal medicine (kaya chikitsa) is the domain of the Charaka Samhita. Statements 1 (rhinoplasty) and 3 (revised by Nagarjuna the alchemist) are correct.
With reference to Ayurveda, consider the following statements:
1. The Atharva Veda is considered a root source of Ayurvedic tradition.
2. Dhanvantari is the divine physician and patron deity of Ayurveda, and National Ayurveda Day is celebrated on Dhanteras.
3. Charaka is traditionally identified as the founder of the surgical (shalya) tradition in Ayurveda.
Which of the statements given above is/are correct?
(a) 1 and 2 only (b) 2 only (c) 1, 2 and 3 (d) 3 only
Answer: (a) 1 and 2 only
Statement 3 is wrong: Charaka is identified with internal medicine (kaya chikitsa). Sushruta is the founder of the surgical tradition. Statements 1 (Atharva Veda) and 2 (Dhanvantari/Dhanteras) are correct.