Generally in Europe you'll find cough suppressants and expectorants aren't combined into the same drug. The ingredient that provides the cough suppressant in Mucinex (which is also the active ingredient in Delsym) is available over the counter in Austria, Germany, Italy, and Spain.

In 2026, the active ingredient in Mucinex, guaifenesin, is legal throughout Europe, but the specific "Mucinex" brand name is rarely found on pharmacy shelves. Instead, you will find it under local brand names like Humex (France), Guaifenesin-CT (Germany), or Guaifenesina (Italy/Spain). While it is an over-the-counter (OTC) medication in the U.S., some European countries have stricter regulations on high-dosage "extended-release" versions, sometimes requiring a pharmacist's consultation. Additionally, European "cold and flu" medicines are more likely to be sold as single-ingredient products rather than the "Max Strength Multi-Symptom" blends common in America. For 2026 travelers, it is perfectly legal to bring your personal supply of Mucinex into Europe in your carry-on, provided it is in its original packaging. However, if you run out, don't ask for "Mucinex"; ask the pharmacist for an "expectorant" or specifically for "guaifenesin" to ensure you get the equivalent treatment.