Tris Promethazine Codeine is a prescription medication that contains a combination of promethazine and codeine. It is used to treat moderate to severe pain. Tris Promethazine Codeine may also be used for purposes not listed in this medication guide.How should I take Tris Promethazine Codeine?Take exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended....