Breathlessness shrinks your world. Seretide Accuhaler helps steady asthma and COPD with two medicines in one device: fluticasone calms inflammation over time, salmeterol keeps airways open for around 12 hours. It's a preventer, not a rescue inhaler used when a lower-dose steroid isn't enough in asthma, and for frequent flarers in COPD. Use it correctly, rinse after each dose, and keep a reliever handy.