Theo-24 Sr is a brand name for an extended-release formulation of theophylline. It is classified as a bronchodilator used in the treatment of reversible airway obstruction. The medication functions by relaxing the smooth muscle of the bronchial airways. Its therapeutic effect improves breathing and reduces symptoms such as wheezing. The extended-release design allows a single dose to maintain drug levels over 24 hours. Release of theophylline leads to inhibition of phosphodiesterase enzymes. This inhibition raises intracellular cyclic adenosine monophosphate, promoting bronchodilation. The resulting increase in bronchodilation helps keep the airways open for longer periods.

Theo-24 Sr is a sustained-release tablet that delivers theophylline over an extended period to manage chronic respiratory disease. Theophylline works by inhibiting phosphodiesterase enzymes in airway smooth muscle. This inhibition raises intracellular cyclic amp levels, causing relaxation of bronchial muscles. The resulting bronchodilation improves airflow and eases breathing in patients with asthma or copd. In addition theophylline has a weak anti-inflammatory effect that further supports airway function. Its sustained-release design maintains therapeutic blood concentrations for up to 24 hours after a single dose. The drug's primary goal is to provide long-lasting improvement in lung function without frequent dosing.

Theophylline sustained-release is associated with several common side effects. Nausea and stomach discomfort are frequently reported. Headaches and difficulty sleeping may occur, especially when therapy begins. Some patients experience palpitations or an increased heart rate. Tremors or restlessness can affect a minority of users. Elevated blood levels may lead to irritability or anxiety. In rare cases, seizures have been documented with high doses. Overall the frequency and severity of these effects vary with dosage and individual response.

The side effects of Theo-24 Sr can vary among individuals. Common reactions include gastrointestinal discomfort such as nausea and heartburn. Some patients may experience headaches or dizziness. Rarely, more serious effects like irregular heartbeat or severe allergic reactions have been reported. These effects often depend on dosage and the patient overall health. Age related changes in metabolism can influence how the drug is processed. Monitoring symptoms and discussing any concerns with a healthcare provider helps ensure safe use.