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  • Title: The effect of raltegravir on the glucuronidation of lamotrigine.
    Author: van Luin M, Colbers A, Verwey-van Wissen CP, van Ewijk-Beneken-Kolmer EW, van der Kolk M, Hoitsma A, da Silva HG, Burger DM.
    Journal: J Clin Pharmacol; 2009 Oct; 49(10):1220-7. PubMed ID: 19717722.
    Abstract:
    The authors studied the effect of raltegravir on the pharmacokinetics of the antiepileptic agent lamotrigine. Twelve healthy volunteers (group A) received 400 mg raltegravir twice daily from days 1 to 5. On day 4, a single dose of 100 mg lamotrigine was administered. After a washout period, participants received a second single dose of 100 mg of lamotrigine but now without raltegravir (day 32). In group B, 12 participants received the same treatment as in group A but in reverse order. On days 4 and 32, 48-hour pharmacokinetic curves were drawn. Geometric mean ratios (+90% confidence intervals [CIs]) of lamotrigine area under the plasma concentration-time curve (AUC(0-->48)) and peak plasma concentration (C(max)) for raltegravir + lamotrigine versus lamotrigine alone were 0.99 (0.96-1.01) and 0.94 (0.89-0.99), respectively. The mean ratio of the AUC(0-->48) of lamotrigine-2N-glucuronide to lamotrigine was similar when lamotrigine was taken alone (0.35) or when taken with raltegravir (0.36). Raltegravir does not influence the glucuronidation of lamotrigine.
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