Seretide Diskus is a prescription inhalation powder manufactured by GlaxoSmithKline. Each dose contains 50 micrograms of salmeterol (as xinafoate) and 250 micrograms of fluticasone propionate. The device provides 60 pre-measured doses and also contains lactose as an inactive ingredient. This is a prescription-only medication that comes in a Diskus inhaler device format. The combination of salmeterol and fluticasone is used to help control asthma and COPD symptoms. The medication should be stored below 30°C as indicated on the packaging. As this is a medical product, it should only be used under the direction of a healthcare provider and according to the prescribed dosage.