By definition, ambroxol hydrochloride is a "clinically-proven systematically active mucolytic agent." Mucolytic agents help loosen and clear the mucus from the airways by breaking up the sputum. Clearing the airways of mucus helps make it easier to breathe.
Ambroxol comes in tablets and syrup. One tablet contains 30 milligrams of ambroxol hydrochloride, while each 5 milliliters of the syrup contain 15 milligrams of ambroxol hydrochloride. Patients taking the drug may experience occasional gastrointestinal side effects, which are normally mild. Patients with gastric ulceration should observe relative caution with taking this medicine. It should not be used during the first trimester of pregnancy. When taken orally, the onset of action from the drug occurs after about 30 minutes.