The metabolism of Omeprazole can be decreased when combined with Tolbutamide. The serum concentration of Saquinavir can be increased when it is combined with Omeprazole. The metabolism of Niclosamide can be decreased when combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Eslicarbazepine acetate. The metabolism of Estradiol can be decreased when combined with Omeprazole. The risk or severity of adverse effects can be increased when Lisuride is combined with Omeprazole. The serum concentration of Ibrutinib can be increased when it is combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Losartan. The metabolism of Omeprazole can be decreased when combined with Diltiazem. The metabolism of Praziquantel can be decreased when combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Pyrimethamine. The therapeutic efficacy of Mesalazine can be decreased when used in combination with Omeprazole. The serum concentration of Riociguat can be decreased when it is combined with Omeprazole. The metabolism of Bromazepam can be decreased when combined with Omeprazole. The metabolism of Dopamine can be decreased when combined with Omeprazole. The serum concentration of Omeprazole can be increased when it is combined with Ivacaftor. The metabolism of Omeprazole can be increased when combined with Phenobarbital. The metabolism of Quazepam can be decreased when combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Crisaborole. The metabolism of Benzatropine can be decreased when combined with Omeprazole. The metabolism of Cabozantinib can be decreased when combined with Omeprazole. The serum concentration of Omeprazole can be increased when it is combined with Ceritinib. The serum concentration of Rilpivirine can be increased when it is combined with Omeprazole. The metabolism of Sertraline can be decreased when combined with Omeprazole. The metabolism of Dapsone can be decreased when combined with Omeprazole. The metabolism of Zidovudine can be decreased when combined with Omeprazole. The metabolism of Estrone can be decreased when combined with Omeprazole. The metabolism of Pethidine can be decreased when combined with Omeprazole. The metabolism of Amitriptyline can be decreased when combined with Omeprazole. The serum concentration of Indinavir can be decreased when it is combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Isoniazid. The metabolism of Guanfacine can be decreased when combined with Omeprazole. The metabolism of Rabeprazole can be decreased when combined with Omeprazole. The metabolism of Cisapride can be decreased when combined with Omeprazole. The serum concentration of Colchicine can be increased when it is combined with Omeprazole. The serum concentration of Afatinib can be increased when it is combined with Omeprazole. The risk or severity of adverse effects can be increased when Ergonovine is combined with Omeprazole. The metabolism of Methylphenobarbital can be decreased when combined with Omeprazole. The metabolism of Podofilox can be decreased when combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Manidipine. The serum concentration of Omeprazole can be decreased when it is combined with Teriflunomide. The metabolism of Etodolac can be decreased when combined with Omeprazole. The serum concentration of Acenocoumarol can be increased when it is combined with Omeprazole. The serum concentration of Omeprazole can be increased when it is combined with Abiraterone. Omeprazole can cause an increase in the absorption of Methylphenidate resulting in an increased serum concentration and potentially a worsening of adverse effects. The metabolism of Mestranol can be decreased when combined with Omeprazole. The metabolism of Quetiapine can be decreased when combined with Omeprazole. The serum concentration of Rifaximin can be increased when it is combined with Omeprazole. Omeprazole can cause a decrease in the absorption of Iron Dextran resulting in a reduced serum concentration and potentially a decrease in efficacy. The metabolism of Carbinoxamine can be decreased when combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Bortezomib. The metabolism of Eszopiclone can be decreased when combined with Omeprazole. The metabolism of Omeprazole can be increased when combined with Rifabutin. The metabolism of Ketoprofen can be decreased when combined with Omeprazole. The serum concentration of Carvedilol can be increased when it is combined with Omeprazole. The metabolism of Macitentan can be decreased when combined with Omeprazole. The metabolism of Sitaxentan can be decreased when combined with Omeprazole. The serum concentration of Posaconazole can be decreased when it is combined with Omeprazole. Omeprazole can cause an increase in the absorption of Amphetamine resulting in an increased serum concentration and potentially a worsening of adverse effects. The metabolism of Acetaminophen can be decreased when combined with Omeprazole. The metabolism of Oxiconazole can be decreased when combined with Omeprazole. The metabolism of Hexobarbital can be decreased when combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Ziprasidone. The metabolism of Bexarotene can be decreased when combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Tranylcypromine. The serum concentration of Tacrolimus can be increased when it is combined with Omeprazole. The metabolism of Mirtazapine can be decreased when combined with Omeprazole. The metabolism of Lapatinib can be decreased when combined with Omeprazole. The serum concentration of Omeprazole can be decreased when it is combined with Cyproterone acetate. The metabolism of Doconexent can be decreased when combined with Omeprazole. The metabolism of Epoprostenol can be decreased when combined with Omeprazole. The risk or severity of adverse effects can be increased when Pergolide is combined with Omeprazole. The serum concentration of Silodosin can be increased when it is combined with Omeprazole. The metabolism of Clomipramine can be decreased when combined with Omeprazole. The serum concentration of Itraconazole can be decreased when it is combined with Omeprazole. The metabolism of Amoxicillin can be decreased when combined with Omeprazole. The metabolism of Leflunomide can be decreased when combined with Omeprazole. The therapeutic efficacy of Ibandronate can be decreased when used in combination with Omeprazole. The serum concentration of Gefitinib can be decreased when it is combined with Omeprazole. The metabolism of Flunarizine can be decreased when combined with Omeprazole. The metabolism of Glimepiride can be decreased when combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Nicardipine. The serum concentration of Saxagliptin can be decreased when it is combined with Omeprazole. The metabolism of Axitinib can be decreased when combined with Omeprazole. The metabolism of Clotiazepam can be decreased when combined with Omeprazole. The metabolism of Dexlansoprazole can be decreased when combined with Omeprazole. The therapeutic efficacy of Alendronic acid can be decreased when used in combination with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Darunavir. The metabolism of Flutamide can be decreased when combined with Omeprazole. The metabolism of Arachidonic Acid can be decreased when combined with Omeprazole. The serum concentration of Delavirdine can be decreased when it is combined with Omeprazole. The metabolism of Phenylbutazone can be decreased when combined with Omeprazole. The metabolism of Zolpidem can be decreased when combined with Omeprazole. The serum concentration of Omeprazole can be decreased when it is combined with Deferasirox. The metabolism of Rosuvastatin can be decreased when combined with Omeprazole. The serum concentration of Methotrexate can be increased when it is combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Fosamprenavir. The metabolism of Candesartan cilexetil can be decreased when combined with Omeprazole. The therapeutic efficacy of Tiludronic acid can be decreased when used in combination with Omeprazole. The serum concentration of Prucalopride can be increased when it is combined with Omeprazole. The metabolism of Zaltoprofen can be decreased when combined with Omeprazole. The metabolism of Olodaterol can be decreased when combined with Omeprazole. The metabolism of Trimethoprim can be decreased when combined with Omeprazole. The metabolism of Trabectedin can be decreased when combined with Omeprazole. The metabolism of Mephenytoin can be decreased when combined with Omeprazole. The metabolism of Aminophenazone can be decreased when combined with Omeprazole. The therapeutic efficacy of Risedronate can be decreased when used in combination with Omeprazole. The metabolism of Doxepin can be decreased when combined with Omeprazole. The serum concentration of Omeprazole can be increased when it is combined with Lumacaftor. The metabolism of Bupivacaine can be decreased when combined with Omeprazole. The serum concentration of Citalopram can be increased when it is combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Mexiletine. The metabolism of Artemether can be decreased when combined with Omeprazole. The metabolism of Celecoxib can be decreased when combined with Omeprazole. The metabolism of Ketobemidone can be decreased when combined with Omeprazole. The metabolism of Diazepam can be decreased when combined with Omeprazole. The metabolism of Imipramine can be decreased when combined with Omeprazole. The metabolism of Propofol can be decreased when combined with Omeprazole. The serum concentration of Cyclosporine can be increased when it is combined with Omeprazole. The risk or severity of adverse effects can be increased when Omeprazole is combined with Atorvastatin. The serum concentration of Topotecan can be increased when it is combined with Omeprazole. The metabolism of Amprenavir can be decreased when combined with Omeprazole. The metabolism of Mefenamic acid can be decreased when combined with Omeprazole. The metabolism of Flurbiprofen can be decreased when combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Armodafinil. The metabolism of Ibuprofen can be decreased when combined with Omeprazole. The serum concentration of Ethyl biscoumacetate can be increased when it is combined with Omeprazole. The metabolism of Trimethadione can be decreased when combined with Omeprazole. The metabolism of Nicotine can be decreased when combined with Omeprazole. The metabolism of Omeprazole can be decreased when combined with Isradipine.