Shlokas & Veda Mantras
नमामि धन्वन्तरमादिदेवं सुरासुरैर्वन्दित पादपद्मम्।
लोके जरारुग्भयमृत्युनाशं दातारमीशं विविधौषधीनाम्॥
"Om Namami Dhanvantaramaadi Devam Surasurairvandita
pada padmam|
Loke jararugbhayamrutyunasham datarameesham vividhaushadheenam||"
Meaning
I bow down to the primeval, supreme God Dhanvantari, whose lotus feet are worshipped by all Gods and demons; who gives different types of medicines to eradicate diseases, old age problems and fear of death in the world.
God Dhanvantari is the manifestation of God Vishnu, the Lord of Ayurveda and the ultimate healer of all the living beings. He holds the Kalasha filled with the nectar of immortality and protects all of the three worlds. The above shloka is recited regularly with sanctity (After the bath with fresh clothes) to seek God Dhanvantari's blessings and medical remedies in abundance to cure the sickness confronting humanity.

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गुरवे सर्वलोकानां भिषजे भवरोगिणाम् ।
निधये सर्वविद्यानां दक्षिणामूर्तये नमः।।
"Gurave sarva lokaanaam, bhishaje bhava roginaam,
Nidhaye sarva vidyaanaam, Dakshinamoorthaye namaha"
Meaning
Salutations to the God of Jnana ,
Who is very auspicious,
Who is the Guru of all the world,
Who is the physician of all diseases of worldly existence,
And who is the source of all the knowledge.

Lord Dakshinamurthy is the God of Enlightenment (AdiGuru)
He is the root of the knowledge. He faces the south and destroys all the ignorance and illuminates the knowledge. He awakened the Brahma Jnana the ultimate knowledge through the medium of silence, sitting under the Vata Vruksha (Banyan Tree). Here we can understand that the real knowledge is received when we practice Mouna(silence) - Mind conversation
Lord Dakshinamurthy is Vighna Nivaraka
He is worshipped for dispelling the obstacles before starting any auspicious work along with Lord Ganapathi, Lord Vishnu, and Goddess Sarvamangala.
Lord Dakshinamurthy is the ultimate healer
He diagnoses and heals the ‘Bhavaroga’ means sorrow of the world.
Let us all worship Lord Dakshinamurthy, who is the destroyer of the miseries of birth and death.