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* In drug-trade lingo, "ethical" drugs are never advertised directly to the public, but always to doctors and druggists through professional and trade journals, and are usually sold only on prescription. "Proprietary" drugs are the old patent medicines gone respectable; no holds are barred in advertising them or pushing over-the-counter sales.
* An old Arab tale which inspired Horace Walpole to add a word to the language in 1754.