Mothers who are ultra-fast metabolizers of codeine reach increased-than-expected serum levels of morphine, most likely resulting in higher levels of morphine in breast milk that can be unsafe to their breastfed infants. Utilization of promethazine and codeine mix is not really recommended in children younger than six decades of age https://elliotmbqe19864.blogaritma.com/31378611/wockhardt-codeine-fundamentals-explained