Xanthine medications are a category of bronchodilators commonly used for ongoing prevention of breathing issues, as seen in conditions like asthma and chronic obstructive pulmonary disease (COPD). These drugs can be administered orally or through intravenous infusion for more severe flare-ups. Aminophylline and theophylline are typical examples of xanthine medications. Potential side effects may include headaches, nausea, and heart palpitations.