Advair is a respiratory medicine brand of GSK plc, a global biopharmaceutical company headquartered in London, United Kingdom. GSK researches, develops, and manufactures prescription medicines and vaccines, with established expertise in respiratory health, including the fluticasone propionate/salmeterol combination marketed as Advair in the United States (Seretide in many other markets).
For the chemical and manufacturing value chain, GSK operates a broad network for small‑molecule active pharmaceutical ingredients, biologics, and finished dosage forms, with dedicated capabilities in pressurized metered‑dose and dry‑powder inhalers. Its operations span Europe, North America, and Asia, supported by external contract manufacturing partnerships and rigorous quality and regulatory systems across major markets.