A general anaesthetic (or anesthetic, see spelling differences) is a drug that brings about a reversible loss of consciousness. These drugs are generally administered by an anaesthesia provider to induce or maintain general anaesthesia to facilitate surgery. The biological mechanism(s) of the action of general anaesthetics are not well understood.
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“Every general increase of freedom is accompanied by some degeneracy, attributable to the same causes as the freedom.”
—Charles Horton Cooley (1864–1929)