Purpose: The objective of the present study was to determine the impact of proton pump inhibitors (PPIs) on the pharmacokinetics and pharmacodynamics of mycophenolic acid (MPA).
Methods: PubMed, Embase, Web of Sciences, and Scopus were systematically searched to identify relevant studies reporting pharmacokinetic parameters [including trough concentration (C0), maximum concentration (Cmax), time to maximum concentration (Tmax), the dose-adjusted area under the concentration-time curve from time 0-12 hours (AUC0-12 h/D), and half-life (t1/2)], and pharmacodynamic outcomes of MPA (eg, acute graft rejection and adverse drug reactions), with and without PPI administration. Pooled effect estimates were calculated using a random-effects model.
Results: Twelve studies involving 473 participants were eligible for inclusion, 11 of which were included in the meta-analysis. PPI exposure was significantly associated with lower C0 [mean difference (MD) = -0.62 mg/L; P = 0.003] lower Cmax (MD = -4.71 mg/L; P = 0.01), and longer Tmax (MD = 0.30 hours; P = 0.0001) of MPA. However, no significant association was observed between PPI exposure and AUC0-12 h/D, t1/2, or any pharmacodynamic outcomes. Based on subgroup analysis, it can be suggested that a significant association between PPI exposure and altered MPA pharmacokinetics was mainly associated with mycophenolate mofetil but not enteric-coated mycophenolate sodium.
Conclusions: Coadministration of PPIs and mycophenolate mofetil significantly altered the pharmacokinetics of MPA, particularly by decreasing MPA absorption. However, PPI-MPA interactions did not impact pharmacodynamic outcomes of MPA.
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