Anaphylaxis: Anaphylaxis has long been documented with codeine, among the components in promethazine HCl and codeine phosphate oral Answer. Absorption Codeine is absorbed with the gastrointestinal tract with most plasma focus transpiring sixty minutes article administration. The presence of the high-fat, high-calorie meal didn't significantly impact the PK of codeine. https://akorn-promethazine-codein58045.ssnblog.com/31482749/the-2-minute-rule-for-akorn-codeine