Elvitegravir/cobicistat/emtricitabine/tenofovir DF increases levels of salmeterol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated (1)lefamulin will improve the level or influence of salmeterol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Lefamulin is contraindicated with CYP3A substrates know to extend the QT interval. Geochemica... https://ch-22319170109.onzeblog.com/28344035/sw033291-can-be-fun-for-anyone