The document discusses the use of theophylline (Nuelin) for treating asthma. It provides definitions of asthma and describes its mechanisms, burden, risk factors, diagnosis and management. A stepwise asthma management and prevention program is outlined involving developing patient-doctor partnerships, identifying risk factors, assessing and monitoring treatment, managing exacerbations, and special considerations. Theophylline formulations Nuelin SR and Nuelin Syrup are described in terms of pharmacology, pharmacokinetics, indications, contraindications and precautions.