3 adjectives to describe anaesthetic

Surgical anaesthetics; Long, Morton, and Simpson.

The first to discover an efficient surgical anaesthetic was Crawford W. Long, of Georgia.

Consequently chloroform soon came to be generally preferred; but abundant experience has finally shown that ether is much the safer agent of the two, and improved methods of administration have almost entirely done away with the objections to its use, so that now it is looked upon as the preferable general anaesthetic.

3 adjectives to describe  anaesthetic