Difflam throat spray is a fast acting oral relief spray that can be used to treat inflammation and soreness in the mouth or throat it is suitable for adults and children of all ages how it works this spray contains benzydamine hydrochloride a painkilling medicine it is used to relieve mild to moderate pain and inflammation when applied directly to the affected area this spray works as a local anaesthetic and causes a numbness that provides pain relief at the site of the application easy t