Learn about Levemir (Insulin Detemir) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related medications. Terbutaline: Chemical Stability of Terbutaline Sulfate Injection After Diluting With 0.9% Sodium Chloride Injecti. Health and Medicine Reference Covering Thousands of. Terbutaline belongs to the class of medications called bronchodilators. It helps to open airways and make breathing easier. Terbutaline works by relaxing the muscles of the airways (lungs) to…