Ayurveda, the science of life, is one of the ancient science of the world. It is believed that Ayurveda came into existence along with the existence of the human race. 21st century although looking like a developed era, in fact is a disease epidemic worldwide. The evolution of human being from the primitive life to this civilized modern world took millions of years. During this course of evolution, the human race has seen a great change in their lifestyle with great social and cultural evolution. Though human being have been able to achieve a lot through the development of new technologies and discovery of new things, the most and universally encountered challenge has always been related to health, one that has affected the society since time immemorial. This desire for long and healthy life has been the driving force for the curious and anxious human mind. This quest led the human race to try and test many things ranging from medicinal plants, animal products, minerals and also many rituals and practices. As mentioned by Charaka, desire for life is the most important of all the three quests and desire. This desire ledto the discovery of the healing properties of nature. The shift of the human race from the vanasprastha jeevan to gramya jeevana led into the increment in suffering. The change in their lifestyle was one of the most important cause. This drastic change and shift in their lifestyle was a challenge to the seers too. With the passage of time, the human civilization became afflicted with many sharirika (Physically) and manasika vikruti(Mentally disease). These afflictions caused the human to suffer more. Thus the cure them was not the only solution. Prevention of the diseases to appear again was one important challenge. Unlike other medical practices, where major emphasis is given in the curative aspect, Ayurveda has emphasized on the preventive aspect of diseases with the main goal of maintenance of health  one of the two objectives. Health, according to Ayurveda, is the homeostasis of the dosha, dhatu and mala. These three entities are considered the moola of the sharira

At the present time, disorders related to respiratory system has increased greatly and KASA (Dry) is also one of these disorders.  According to Ayurveda, it appears as an independent disease and sometimes as a symptom of other diseases. The characterization of Kasa is that it is an attempt to remove foreign matter in the respiratory tract and inflammation in the respiratory tract.  It turns out that this is Kasa.  In the meaning of the word Kas, the sign of not neglecting it is hidden.  Acharya Charaka has said this in the end by instructing the five distinctions of Kaas. That is, Kasa disease is going to cause the decay of the body if it is neglected.

India is a tropical and developing country.  With the increase of modernization and industrialization, the environment is also becoming polluted due to which there is a continuous increase in air pollution.  And the best quality of air is being decreasing day by day .  And due to this, respiratory diseases are also increasing.  Kasa is also one of these.  Which arises from the entry of heterogeneous substances into the respiratory system.  According to Ayurveda opinion, we can call it Vatika kasa .  According to modern belief, the symptoms of this  disease are similar to those of Tropical Pulmonary Eosinophilia (TPE).

Basis of topic selection

In this way of modern relaxed lifestyle, mental stress and competition, humans have invited many kinds of sufferings themselves.  The good quality of food, water, air determines human health.  But in this era of modernization and industrialization, the environment is becoming polluted, dust, smoke, vapor are constantly coming out of these industries.  By which the atmosphere contains Co, CO2, SO, etc. gases.  Due to which, due to air pollution, its quality is being destroyed.  The respiratory rate of a healthy human is 16 - 18 breaths per minute.  This action makes the respiratory system (pranavam strotas) more susceptible to disease.  Kasa is generated by irritation  in the respiratory system by dust ,fumes, vapours etc. Vatika kasa which we can call Dry cough  is very similar to Tropical pulmonary Eosinophilia.  In modern medical science, diethylcarbamazine is used for its treatment, which suppresses disease till taking the drug.  But after stopping the drug, the disease reoccur.  Therefore, according to modern reflection, the best medicine is needed for this disease, because the prevalence of this disease is also increasing due to increasing environmental pollution. 

Basis of Medicine selection

For the treatment of Tropical pulmonary eosinophilia as a medicine  Bharngyadi avaleh mentioned in the fifth  chapter of the Gad Nigraha ( in avleha form) &  Vasadi Kashaya described in Sharangadhar Samhita 9 (in decoction form )  are being used . these medicines are prepared from herbal medicinal ingredients. No any complications and harmful effect are described in ayurveda Samhita’s about above medicinal herbal formulations . Hence this medicines are used to treat Tropical pulmonary eosinophilia (Vatika Kasa ) safely & effectively.