Thyme essential oil has been used therapeutically since 1589, while it has been included in many pharmacopoeias since 1949. The European Medicines Agency (EMA) describes its expectorant, anti-inflammatory, antibacterial and antiseptic properties. Ιt contributes to the treatment of upper respiratory tract infections, bronchitis symptoms and cold coughs. Its therapeutic effect is attributed to thymol, the main active ingredient of the essential oil.