OTC
Cough expectorant combination
Ammonium chloride; Sodium citrate; Squill; Menthol
Last reviewed April 2026
Who is this for?
What is this drug?
This is a combination cough mixture (commonly sold as Menthodex Cough Syrup) that works in several ways — ammonium chloride and squill help loosen thick phlegm so you can cough it out more easily, sodium citrate helps reduce the thickness of mucus, and menthol gives a cooling, soothing feeling in your throat and airways.
What is it used for?
Cough with phlegm (productive cough)chest congestioncatarrhcommon cold symptomsbronchial congestion
Available Over The Counter
Available at pharmacies without a prescription. Rules may vary by country.