If your snoring symptoms are caused by blockage of nasal passages due to colds or allergies the non-drowsy oil-free formula in SnoreStop NasoSpray will help relieve snoring symptoms open nasal passages and clear sinus congestion The NasoSpray formula has shown no side effect nor drug interaction with other medications. SnoreStop`s mode of action is decongestive anti-inflammatory anti-histaminic and mucolytic.