What Does Theophylline Do For Dogs. Respiratory infections, such as kennel cough. It is a bronchodilator used to reduce inflammation and swelling of muscles in the lungs and chest.

Pick up and fill a new prescription for your pet or refill a. You may break a scored tablet in half if. The action of the theophylline is guided by the relaxation of the muscles that surround the airways of the pets and clears out the mucus that gets built up inside them.