Selected Azole Antifungals/Antacids; Lanthanum
Serious. These medicines may interact and cause very harmful effects. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.
How the interaction occurs:
When these two medicines are taken together, the amount of antifungal medicine absorbed by your body may decrease.
What might happen:
You may experience a decrease in the beneficial effects of your antifungal medicine.
What you should do about this interaction:
Contact your healthcare professionals (e.g. doctor or pharmacist) about taking these two medicines together. They may already be aware of this interaction and may be monitoring you for it. If your doctor prescribes these two medicines together, it may be necessary to adjust the time you take each medicine. You may be instructed to take your antifungal medicine at least two hours before taking your other medicine. Do not start, stop, or change the dosage of any medicine before checking with them first.
1.Lohitnavy M, Lohitnavy O, Thangkeattiyanon O, Srichai W. Reduced oral itraconazole bioavailability by antacid suspension. J Clin Pharm Ther 2005 Jun;30(3):201-6.
2.Moreno F, Hardin TC, Rinaldi MG, Graybill JR. Itraconazole-didanosine excipient interaction. JAMA 1993 Mar 24-31;269(12):1508.
3.Brass C, Galgiani JN, Blaschke TF, Defelice R, O'Reilly RA, Stevens DA. Disposition of ketoconazole, an oral antifungal, in humans. Antimicrob Agents Chemother 1982 Jan;21(1):151-8.
4.Van Der Meer JW, Keuning JJ, Scheijgrond HW, Heykants J, Van Cutsem J, Brugmans J. The influence of gastric acidity on the bio-availability of ketoconazole. J Antimicrob Chemother 1980 Jul;6(4):552-4.
5.Thorpe JE, Baker N, Bromet-Petit M. Effect of oral antacid administration on the pharmacokinetics of oral fluconazole. Antimicrob Agents Chemother 1990 Oct;34(10):2032-3.
6.May DB, Drew RH, Yedinak KC, Bartlett JA. Effect of simultaneous didanosine administration on itraconazole absorption in healthy volunteers. Pharmacotherapy 1994 Sep-Oct;14(5):509-13.
7.Knupp CA, Brater DC, Relue J, Barbhaiya RH. Pharmacokinetics of didanosine and ketoconazole after coadministration to patients seropositive for the human immunodeficiency virus. J Clin Pharmacol 1993 Oct;33(10):912-7.
8.Damle BD, Mummaneni V, Kaul S, Knupp C. Lack of effect of simultaneously administered didanosine encapsulated enteric bead formulation (Videx EC) on oral absorption of indinavir, ketoconazole, or ciprofloxacin. Antimicrob Agents Chemother 2002 Feb;46(2):385-91.
9.Fosrenol (lanthanum carbonate) Canadian prescribing information. Shire BioChem February 19, 2007.
10.Fosrenol (lanthanum carbonate) US prescribing information. Shire US Inc. September, 2011.