Pharmacodynamics/Kinetics
Onset of action: Cataflamยฎ is more rapid than sodium salt (Voltarenยฎ) because it dissolves in the stomach instead of the duodenum
Absorption: Topical gel: 6% to 10%
Protein binding: 99% to albumin
Metabolism: Hepatic to several metabolites
Half-life elimination: 2 hours; Patch: ~12 hours
Time to peak, serum: Cataflamยฎ: ~1 hour; Flectorยฎ: 10-20 hours; Solarazeยฎ Gel: ~5 hours; Voltarenยฎ: ~2 hours; Voltarenยฎ Gel: 10-14 hours