1. Introduction to Promethazine and Codeine 6.25mg/473ml Promethazine and Codeine 6.25mg/473ml is a combination prescription syrup that is primarily used to treat symptoms related to colds and allergies such as cough, runny nose, and sneezing. Promethazine acts as an antihistamine, while Codeine is a narcotic cough suppressant. Together, they form a powerful medication that not […]