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KMID : 1102220200390040479
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Kidney Research and Clinical Practice
2020 Volume.39 No. 4 p.479 ~ p.486
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The impact of omeprazole on mycophenolate pharmacokinetics in kidney transplant recipients
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AbdElhalim Mohamed S.
Kenawy Ahmed S.
El Demellawy Heba H.
Azouz Amany A.
Alghanem Sarah S.
Al-Otaibi Torki
Gheith Osama
ElMonem Mohamed Abd
Afifi Mohammed K.
Hussein Raghda R. S.
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Abstract
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Background: The absorption rates of mycophenolate mofetil (MMF) and enteric-coated mycophenolate sodium (EC-MPS) may be influenced by the concomitant use of omeprazole.
Methods: One hundred kidney transplant patients were recruited during their outpatient visits, including 50 on MMF and 50 on EC-MPS. At the clinic, a predose mycophenolic acid (MPA) sample (C0) was collected; subsequently, the participants received the proton-pump inhibitor omeprazole along with either MMF or EC-MPS. Two more blood samples were collected at 1.5 and 3.5 hours and used to estimate an area under the curve (AUC) from zero to 12 hours [AUC (0-12)].
Results: The mean number of months after transplant was 92 months. The median AUC (0-12) and C0 results were 62.2 mg·h/L and 2.0 mg/L for the MMF group and 71.9 mg·h/L and 1.8 mg/L for the EC-MPS group (P = 0.160 and 0.225, respectively). Interestingly, 54% of the MMF group and 62% of the EC-MPS group showed AUCs above the target values. The correlation between MPA C0 and the predicted AUC was poor in both groups.
Conclusion: Omeprazole can be safely co-administered with either MMF or EC-MPS, as it did not compromise the MPA exposure. Unexpectedly, however, a high percentage of patients presented MPA AUCs exceeding the target value, highlighting the importance of periodically assessing MPA level.
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KEYWORD
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Area under curve, Enteric-coated mycophenolate sodium, Kidney transplantation, Mycophenolate mofetil, Mycophenolic acid, Omeprazole
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