Most are familiar with the Hippocratic Oath, though usually their knowledge is limited to the statement that physicians should First, do no harm. For centuries, it provided the fundamental basis of trust between patient and physician. The phrase is in fact a boiled down version of the original ancient text.
I will neither give a deadly drug to anybody who asked for it, nor will I make a suggestion to this effect.
THE HIPPOCRATIC OATH – Classical Version
However, that assurance of benevolence has somewhat surreptitiously been removed from more modern versions of the Oath, with some medical schools even abandoning its use altogether.