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  • Title: Effect of bile acids on absorption of nitrendipine in healthy subjects.
    Author: Sasaki M, Maeda A, Sakamoto K, Fujimura A.
    Journal: Br J Clin Pharmacol; 2001 Dec; 52(6):699-701. PubMed ID: 11736882.
    Abstract:
    AIMS: To examine whether bile acids such as ursodeoxycholic acid (UDCA) and chenodeoxycholic acid (CDCA) can influence the absorption of nitrendipine, a highly lipophilic calcium channel blocker. METHODS: Six healthy subjects received nitrendipine (10 mg) with and without UDCA (50 mg) and CDCA (200 and 600 mg) with an interval of 1 approximately 2 weeks between study phases. RESULTS: Bile acids decreased the Cmax (ng ml(-1)) [control 10.9 +/- 5.8 (mean+/- s.d.), UDCA 5.0 +/- 4.7 (95% confidence interval for difference; 3.9, 7.8, P = 0.0006), CDCA (600 mg) 5.0 +/- 3.9 (2.6, 9.2, P = 0.0059)] and AUC (ng ml(-1) h) [(control; 60 +/- 36, UDCA 15 +/- 13 (20, 73, P = 0.0064), CDCA (600 mg) 19 +/- 19 (21, 63, P = 0.0038)] of nitrendipine, while elimination half-life remained unchanged. CONCLUSIONS: These results suggest that the amount of nitrendipine absorbed was decreased when the drug was administered with UDCA and CDCA.
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