Koffex is used to relieve and soothe coughs caused by phlegm. Diphenhydramine hydrochloride, ammonium, and sodium citrate are the active ingredients in
Koffex to relieve bronchial congestion. The mucus-suppressing substances that act as an anesthetic stimulate the respiratory system, which leads to increased mucus production in the bronchi, thus facilitating its removal and reducing the symptoms of colds and flu.