pharmacopoeia /fär′məkəpē″ə/ [Gk, pharmakon + poiein, to make] , 1. a compendium containing descriptions, recipes, strengths, standards of purity, and dosage forms for selected drugs. 2. the available stock of drugs in a pharmacy. 3. the total of all authorized drugs available within the jurisdiction of a given geographic or political area. Also spelled pharmacopeia. See also British Pharmacopoeia, United States Pharmacopeia.