CODEINE (C18 H2, NO3 H3PO4 1/2 H2O) Our team researched the drug Codeine. We used several different sources to gather our information. We go information from Jay Moser and Sue Peterson, our two local pharmacists. We researched medical encyclopedias, journals, and magazines. Codeine is known medically as methylmorphine. It is a drug derived from opium, a poppy plant. It was discovered in 1832 by French chemist Pierre-Jean Robiquet. Codeine constitutes about 0.5 to 2.5 percent of this plant substance. The drug has been in use since the early 1900's and it shares most of the pharmacologic charac