<p>Fluticasone Propionate, an individual component of this inhaler, is a substrate of CYP 3A4. The effects of short-term co-administration of strong CYP 3A4 inhibitors (e.g. Ritonavir, Atazanavir, Clarithromycin, Indinavir, Itraconazole, Nelfinavir, Saquinavir, Ketoconazole, Telithromycin) together with this inhaler is of minor clinical relevance, but caution needs to be taken in long-term treatment and co-administration with such drugs should be avoided if possible.</p>