Introducing Mucinex® InstaSoothe Sore Throat + Pain Relief Spray. This Powerful sore throat relief with soothing cherry flavor is an easy-to-use spray that numbs pain fast so you can get back to your day. Our alcohol-free spray numbs pain fast and helps to relieve occasional minor irritation and pain associated with sore throat, sore mouth and canker sores. Powerful sore throat relief with soothing cherry flavor.