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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“The General has dedicated himself so many times, he must feel like the cornerstone of a public building.”
—Adlai Stevenson (1900–1965)