Assertion: morphine's use | /r/HasSubevent | lower codeine levels
Facets:
Source sentences:
text: The concomitant use of Codeine Sulfate Tablets with all cytochrome P450 3A4 inducers or discontinuation of a cytochrome P450 3A4 inhibitor may result in lower codeine levels, greater norcodeine levels, and less metabolism via 2D6 with resultant lower morphine levels.