Terbutaline + Ambroxol is a combination of two medicines: Terbutaline + Ambroxol1 and Terbutaline + Ambroxol2, which relieves cough. Terbutaline and ambroxol. Terbutaline is a bronchodilator which relaxes muscles in your airways and widens airways. Ambroxol is a mucolytic which thins and loosens mucus (phlegm), making it easier to cough out. Together, they make breathing easier.