Hindus know Dhanwantari as the celestial healer and physician of the Gods. Lord Dhanwantari is regarded as the god of ayurvedic medicine in the Hindu religion. He is thereby the father of medical science. Lord Dhanwantari is an Avatar of Lord Maha Vishnu and is often depicted as dark complexioned strong man with a broad chest carrying a jug containing the nectar of immortality and wearing yellow clothes. According to Bhagavatam he was also garlanded with flowers and his fully decorated with various ornaments. He is also depicted in his four-armed form holding the Sudarsana Chakra and Conch in the upper right and lefts hands. In the other two hands he carries a pot containing the nectar of immortality and a herb. According to Hindu Puranas Lord Dhanvantari emerged from the ocean of milk with a pot of Amrit when it was churned by Gods and Demons. He is also called Sudhapani, which means 'carrying nectar in his hands'.
Dhanwantari is also said to have made an appearance in the Dwapar Yuga, two billion years ago. He appeared again as the son of King Dirghatamas of Kasi as the answer for his penance for a son. He is said to have prepared the samhitas on Ayurveda in eight divisions for the benefit of humanity. Lord Dhanvantari's teachings are recorded in the Agni Purana 279-289 as well as through the teachings of His disciple Susrutha.Dhanvantari is worshipped in Hindu households on Dhantrayodashi or Dhanteras which is the first day of Diwali. This day is considered very auspicious day to buy gold and silver jewelry, vehicles etc. Devotees worship Lord Dhanvantari to seek his blessings for sound health. He is also a much revered God of Ayurvedic Practitioners and Healers. Given below is his Maha Mantra which can be used to pray to Dhanvantari for improved or good health for self and for others.
"Om Namo Bhagavate Maha Sudharshana Vasudevaya Dhanvantaraye; Amrutha Kalasa Hasthaaya Sarva Bhaya Vinasaya Sarva Roka Nivaranaya Thri Lokya Pathaye Thri Lokya Nithaye Sri Maha Vishnu Swarupa Sri Dhanvantri Swarupa Sri Sri Sri Aoushata Chakra Narayana Swaha"
Meaning: We pray to the God, who is known as Sudarshana Vasudev Dhanvantari who holds the pot full of the nectar of immortality. Lord Dhanvantri removes all fears and removes all diseases and is the well wisher and the preserver of the three worlds like Lord Vishnu who is empowered to heal the Jiva souls. We bow to you.
Short Mantras of Lord Dhanvantri Om Dhanvantaraye Namah Om Shri Dhanvantre Namah
Dhanwantri Maha Mantra "Om Namo Bhagavate Maha Sudharshana Vasudevaya Dhanvantaraye; Amrutha Kalasa Hasthaaya Sarva Bhaya Vinasaya Sarva Roka Nivaranaya Thri Lokya Pathaye Thri Lokya Nithaye Sri Maha Vishnu Swarupa Sri Dhanvantri Swarupa Sri Sri Sri Aoushata Chakra Narayana Swaha"