You need to be aware of the drug interactions before you purchase Advair Diskus. If you are using diuretic, amiodarone, HIV medications, any types of antibiotics, antifungal medicines then you must inform your doctor. In fact, you need to tell your doctor about the medicines and why are you taking them before you order Advair Diksus. Only then will your doctor be able to understand what medicine is best for your condition. Your doctor may also  change the dosage, depending on your health. You should never self meditate. Consult your doctor before you order fluticasone and salmeterol to determine the most effective dosage and medicaiton for your condition.