Hello. Thank you for visiting our store, we buy things in a licensed pharmacy in the European Union. Vintrozen contains the active substance acetylcysteine, which belongs to a group of drugs called mucolytics, which are used to facilitate the removal of mucus from the respiratory tract. Compound Active ingredient: acetylcysteine: 1 effervescent tablet contains 600 mg of acetylcysteine. Other Ingredients: Citric acid, maltodextrin, sodium bicarbonate, orange flavor (maltodextrin, gum arabic, ascorbic acid, butylated hydroxyanisole (BHA)), leucine, sodium saccharin. Usage Adults and teenagers over 14 years of age. The recommended dose is 1 tablet (600 mg) per day, preferably in the evening.