Blockage from the Intestine. Many people having promethazine/phenylephrine/codeine may create severe constipation or perhaps a blockage of the gut (bowel obstruction).Breastfeeding. Will not take promethazine/phenylephrine/codeine if you are breastfeeding. Promethazine/phenylephrine/codeine can pass into breast milk. Notify your healthcare provider… Read More