Objective: To compare the pharmacokinetics of the extended-release MMX Õ formulation of budesonide (Uceris Õ ) with that of Entocort Õ EC, an extended (controlled ileal) release formulation of budesonide.
Methods:Using an open-label, randomized, three-period crossover, Latin square design, healthy male or female volunteers received single doses of 6 mg Uceris Õ , 9 mg Uceris Õ or 9 mg Entocort Õ EC. Standard pharmacokinetic parameters were assessed. Results: The study included 12 subjects. The 9 mg Uceris Õ and 9 mg Entocort Õ EC formulations had comparable area under the concentration-time curve (AUC) data, but 9 mg Uceris Õ had a notably longer time to first appearance in plasma (median T lag , 6 h versus 1 h, respectively), and a delayed time to maximum concentration (median T max , 15 h versus 5 h, respectively) compared with 9 mg Entocort Õ EC. The ratio of log-transformed AUC 0-last (Uceris Õ /Entocort Õ EC) was 91% (90% confidence interval [CI] 77%, 108%) and the corresponding maximum concentration ratio was 79% (90% CI 63%, 100%). Conclusion: Uceris was associated with a similar extent (AUC) of systemic exposure to budesonide compared with that following Entocort. However, for Uceris, the pharmacokinetic profile was delayed, a pattern consistent with greater colonic delivery of the active substance.