It is about equal to codeine in depressing the cough reflex. In therapeutic dosage dextromethorphan does not inhibit ciliary activity. Promethazine is an H 1 receptor blocking agent. In addition ...

On Medindia find the complete list of Expectorant And Cough Products drugs with ... Promethazine/Codeine 6.25mg+10mg/5ml Syrup Y55.4 Promethazine/DM 6.25mg+15mg/5ml Syrup Y55.4 Promethazine ...