In Tibetan images of the Medicine Buddha, his body is a deep royal blue as sky in colored surrounded by a halo of rainbow light. His holy sky body signifies omniscient wisdom and compassion as huge as limitless space and is particularly associated with healing both mental and physical suffering.
His right hand faces outward, symbolizing his bestowal of boons and holds a spring of aurora, or cherubic Myrobalan, from which much of Tibetan medicine is compounded. Tibetan medicine recognizes three basic types of illness, the root causes of which are the conflicting emotions -- passion, aggression, and ignorance. Myrobalan is the only herb in the Tibetan medicine that can aid in healing each of these three types of diseases. In his left hand he holds a bowl containing three forms of ambrosia: the nectar that cures disease and resurrects the dead; the nectar that counteracts aging; and the supreme nectar that illuminates the mind increases knowledge.
The practice of the medicine Buddha is very powerful, not only for healing diseases, but for purifying the negative karma of those who recover from illness and those who dies of it. This practice is also powerful for bringing success, temporary as well as ultimate. Making a connection with him, practicing meditation, reciting his mantra or even just saying his name helps us achieve inconceivable benefits
This is the short version of the Medicine Buddha Mantra, which is known as the Medicine Buddha Heart Mantra, is:Tayata, Om, Bhaishaye Bhaishaye Maha-Bhaishaye Raja Samudgate, Svaha.
or, pronounced the Tibetan way:
Tayata, Om, bekandzeh, bekandzeh maha-bekandzeh, radza samungateh. Soha.
H.H. 17 Karmapa Chanting Medicine Buddha Mandala.
Tathagataya: means once came bekandze means great eliminating of pain, The second "bekandze" eliminates all the true cause of suffering. The third maha bekandze "great eliminating" refers to eliminating even the subtle imprints left on the consciousness by disturbing thoughts. Om is composed of three sounds, ah, o, and ma, and signify the Medicine Buddha's completely pure holy body, holy speech, and holy mind. Samudgate means the supreme heights. Like this my prayer shall go to the highest and the widest and the deepest. svaha: I offer this prayer and relinquish to you Medicine Buddha 'May all beings benefit from the sublime love and power of Medicine Buddha'
Read more about long mantra and other medicine Buddha chants at Medicine Buddha and his mantra