Theo-SR is a drug used to treat acute and chronic asthma, bronchospasm, and apnea of prematurity that affects newborns.
Theo-SR is a bronchodilator that belongs to the methylxanthine class. It is used to treat symptoms of asthma or other respiratory diseases such as bronchitis and emphysema that are accompanied by obstruction of the airway.
Theo-SR works by relaxing the muscles surrounding the bronchi, allowing them to expand. It also increases the resistance of the airways to substances that cause contraction, which makes it easier for patients to breathe.