The Imam was asked a long question of which a part was - What is the opinion of the scholars regarding a man who is afflicted by a disease, and knows that if it should continue it would damage his life? The Imam Quoted the Hadith from Sahih Bukhari in which The Prophet ( صلى الله عليه و سلم ) said:

'Allah has appointed a remedy for every disease He has sent down'. 

Imam Ahmad reported on the authority of Usamah bin Shareek that the ' Prophet ( صلى الله عليه و سلم) said,

'Allah has not made a disease without providing a remedy for it, wih the exception of one disease, namely old age'

This Applies to the medicine for the heart, soul and body. The well being of the servant's heart, is far more important than that of his body, for while the well being of his body enables him to lead a life that is free from illnesses in this world, that of the heart ensures him both a fortunate life in this world and eternal bliss in the next.