The white pill with the imprint Z C 0 2 has been identified as containing Promethazine Hydrochloride 25 mg. Promethazine was developed in the mid-1940s when a team of scientists from the French chemical manufacturing company Rhône-Poulenc combined phenothiazine and a diamine side chain of diphenhydramine to create a new drug. Their creation, promethazine, is […]