0 interactions for Promethazine Hcl, Phenylephrine Hcl, Codeine Phosphate - Promethazine, Phenylephrine, Codeine syrup®A therapy excluded from this list of known interactions does not necessarily mean that no interactions exist between that therapy and and Promethazine Hcl, Phenylephrine Hcl, Codeine Phosphate - Promethazine, Phenylephrine, Codeine syrup®.