- Ambrodil-S Syrup helps to loosen thick mucus, making it easier to cough out. This makes it easier for air to move in and out. It will relieve symptoms such as tightness in your chest, shortness of breath, wheezing and coughing and help you carry out your daily activities more easily. This medicine is safe and effective. It usually starts to work within a few minutes and the effects can last up to several hours.