Comparative Pharmacology
Head-to-head clinical analysis: ELIXOPHYLLIN SR versus PHYLLOCONTIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ELIXOPHYLLIN SR versus PHYLLOCONTIN.
ELIXOPHYLLIN SR vs PHYLLOCONTIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Theophylline relaxes bronchial smooth muscle by inhibiting phosphodiesterase, increasing intracellular cAMP, and antagonizing adenosine receptors. It also has anti-inflammatory effects by reducing eosinophil infiltration and cytokine release.
Sustained-release theophylline; nonselective phosphodiesterase (PDE) inhibitor, adenosine receptor antagonist, and histone deacetylase activator. Bronchodilation via relaxation of bronchial smooth muscle; also reduces airway hyperresponsiveness and inflammation.
300-600 mg orally every 12 hours; extended-release tablets. Adjust based on serum theophylline concentrations (target 5-15 mcg/mL).
For chronic obstructive pulmonary disease and asthma: initial dose 225 mg orally twice daily; may increase to 450 mg twice daily. Based on theophylline, target serum concentration 5-15 mcg/mL.
None Documented
None Documented
Terminal elimination half-life: 7-9 hours in adults (nonsmokers). In smokers, hepatic clearance is increased, reducing half-life to 4-5 hours. In patients with hepatic cirrhosis, half-life may extend to 24 hours. In neonates, half-life is prolonged (20-30 hours).
Terminal elimination half-life: 3-8 hours in non-smoking adults; reduced to 1.5-5 hours in smokers; prolonged to 10-30 hours in heart failure or hepatic cirrhosis.
Renal: approximately 90% of the dose is eliminated via hepatic metabolism (N-demethylation and hydroxylation), with about 10% excreted unchanged in urine. The primary metabolites are 1-methylxanthine, 1,3-dimethyluric acid, and 3-methylxanthine. Fecal excretion is negligible (<1%).
Renal: approximately 10% unchanged; hepatic metabolism accounts for ~90% of clearance; metabolites eliminated renally.
Category C
Category C
Xanthine Bronchodilator
Xanthine Bronchodilator