, ritonavir) or discontinuation of the cytochrome P450 3A4 inducer including rifampin, carbamazepine, and phenytoin, might cause an increase in codeine plasma concentrations with subsequently greater metabolism by cytochrome P450 2D6, resulting in bigger morphine concentrations, which could improve or lengthen adverse reactions and could induce most likely deadly respiratory https://akorn-promethazine-codein91122.tinyblogging.com/details-fiction-and-akorn-promethazine-codeine-75946687