The metabolism of Loperamide can be decreased when combined with Quinidine. The metabolism of Loperamide can be increased when combined with Nevirapine. The metabolism of Loperamide can be decreased when combined with Dosulepin. The metabolism of Loperamide can be decreased when combined with Clotrimazole. The serum concentration of Loperamide can be increased when it is combined with Luliconazole. The metabolism of Loperamide can be decreased when combined with Desipramine. The metabolism of Loperamide can be decreased when combined with Sorafenib. The metabolism of Loperamide can be decreased when combined with Quinine. The serum concentration of Loperamide can be decreased when it is combined with St. John's Wort. The serum concentration of Loperamide can be decreased when it is combined with Tocilizumab. The metabolism of Loperamide can be decreased when combined with Duloxetine. The serum concentration of Loperamide can be increased when it is combined with Panobinostat. The metabolism of Loperamide can be increased when combined with Rifabutin. The metabolism of Loperamide can be decreased when combined with Clarithromycin. The metabolism of Loperamide can be decreased when combined with Nefazodone. The serum concentration of Loperamide can be decreased when it is combined with Enzalutamide. The metabolism of Loperamide can be decreased when combined with Promazine. The serum concentration of the active metabolites of Dabigatran etexilate can be increased when Dabigatran etexilate is used in combination with Loperamide. The metabolism of Loperamide can be decreased when combined with Fluconazole. The metabolism of Loperamide can be decreased when combined with Terbinafine. The metabolism of Loperamide can be decreased when combined with Topiroxostat. The metabolism of Loperamide can be decreased when combined with Trimethoprim. The metabolism of Loperamide can be decreased when combined with Voriconazole. The metabolism of Loperamide can be decreased when combined with Artemether. The metabolism of Loperamide can be decreased when combined with Lovastatin. The metabolism of Loperamide can be increased when combined with Secobarbital. The metabolism of Loperamide can be decreased when combined with Posaconazole. The metabolism of Loperamide can be decreased when combined with Teriflunomide. The metabolism of Loperamide can be decreased when combined with Doxycycline. The metabolism of Loperamide can be decreased when combined with Erythromycin. The metabolism of Loperamide can be decreased when combined with Cinacalcet. The metabolism of Loperamide can be decreased when combined with Saquinavir. The serum concentration of Loperamide can be increased when it is combined with Ivacaftor. The metabolism of Loperamide can be decreased when combined with Crizotinib. The serum concentration of Afatinib can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Nelfinavir. The metabolism of Loperamide can be decreased when combined with Paroxetine. The metabolism of Loperamide can be decreased when combined with Isradipine. The serum concentration of Silodosin can be increased when it is combined with Loperamide. The serum concentration of Naloxegol can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Midostaurin. The serum concentration of Loperamide can be increased when it is combined with Fosaprepitant. The metabolism of Loperamide can be decreased when combined with Telaprevir. The metabolism of Loperamide can be decreased when combined with Boceprevir. The metabolism of Loperamide can be decreased when combined with Lorcaserin. The serum concentration of Loperamide can be decreased when it is combined with Bosentan. The metabolism of Loperamide can be decreased when combined with Isoniazid. The metabolism of Loperamide can be decreased when combined with Darifenacin. The metabolism of Loperamide can be decreased when combined with Imipramine. The serum concentration of Loperamide can be decreased when it is combined with Dabrafenib. The metabolism of Loperamide can be decreased when combined with Venlafaxine. The serum concentration of Loperamide can be increased when it is combined with Quazepam. The metabolism of Loperamide can be decreased when combined with Tamoxifen. The serum concentration of Edoxaban can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Lumefantrine. The metabolism of Loperamide can be decreased when combined with Doxorubicin. The metabolism of Loperamide can be decreased when combined with Diltiazem. The serum concentration of Loperamide can be increased when it is combined with Dasatinib. The metabolism of Loperamide can be increased when combined with Rifampicin. The serum concentration of Brentuximab vedotin can be increased when it is combined with Loperamide. The serum concentration of Prucalopride can be increased when it is combined with Loperamide. The serum concentration of Loperamide can be increased when it is combined with Aprepitant. The metabolism of Loperamide can be decreased when combined with Clomipramine. The serum concentration of Colchicine can be increased when it is combined with Loperamide. The metabolism of Loperamide can be increased when combined with Carbamazepine. The metabolism of Loperamide can be increased when combined with Phenobarbital. The metabolism of Loperamide can be decreased when combined with Fosamprenavir. The metabolism of Loperamide can be decreased when combined with Efavirenz. The metabolism of Loperamide can be decreased when combined with Delavirdine. The metabolism of Loperamide can be decreased when combined with Crisaborole. The metabolism of Loperamide can be decreased when combined with Mirabegron. The serum concentration of Loperamide can be increased when it is combined with Stiripentol. The metabolism of Loperamide can be decreased when combined with Olaparib. The metabolism of Loperamide can be decreased when combined with Sildenafil. The metabolism of Loperamide can be decreased when combined with Lopinavir. The metabolism of Loperamide can be decreased when combined with Itraconazole. The metabolism of Loperamide can be decreased when combined with Amiodarone. The metabolism of Loperamide can be decreased when combined with Nicardipine. The serum concentration of Conivaptan can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Haloperidol. The metabolism of Loperamide can be decreased when combined with Rucaparib. The metabolism of Loperamide can be decreased when combined with Clopidogrel. The metabolism of Loperamide can be decreased when combined with Fluoxetine. The metabolism of Loperamide can be decreased when combined with Cimetidine. The metabolism of Loperamide can be decreased when combined with Thiotepa. The metabolism of Loperamide can be decreased when combined with Tipranavir. The metabolism of Loperamide can be decreased when combined with Isavuconazonium. The metabolism of Loperamide can be decreased when combined with Betaxolol. The metabolism of Loperamide can be decreased when combined with Rolapitant. The serum concentration of Everolimus can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Pioglitazone. The metabolism of Loperamide can be decreased when combined with Sertraline. The serum concentration of Rifaximin can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Dihydroergotamine. The metabolism of Loperamide can be decreased when combined with Chloroquine. Loperamide may increase the constipating activities of Ramosetron. The metabolism of Loperamide can be decreased when combined with Cyclosporine. The metabolism of Loperamide can be decreased when combined with Losartan. The serum concentration of Loperamide can be increased when it is combined with Ceritinib. The metabolism of Loperamide can be decreased when combined with Indinavir. The metabolism of Loperamide can be decreased when combined with Ziprasidone. The metabolism of Loperamide can be increased when combined with Phenytoin. The metabolism of Loperamide can be decreased when combined with Methadone. The serum concentration of Loperamide can be increased when it is combined with Fusidic Acid. The metabolism of Loperamide can be decreased when combined with Clemastine. The metabolism of Loperamide can be decreased when combined with Thioridazine. The metabolism of Loperamide can be decreased when combined with Dronedarone. The serum concentration of Loperamide can be decreased when it is combined with Mitotane. The metabolism of Loperamide can be decreased when combined with Metoprolol. The metabolism of Loperamide can be decreased when combined with Nilotinib. The metabolism of Loperamide can be decreased when combined with Ticlopidine. The serum concentration of Ledipasvir can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Idelalisib. The serum concentration of Loperamide can be decreased when it is combined with Peginterferon alfa-2b. The metabolism of Loperamide can be decreased when combined with Celecoxib. The metabolism of Loperamide can be decreased when combined with Lapatinib. The metabolism of Loperamide can be increased when combined with Fosphenytoin. The metabolism of Loperamide can be increased when combined with Rifapentine. The metabolism of Loperamide can be decreased when combined with Felodipine. The metabolism of Loperamide can be decreased when combined with Cholecalciferol. The serum concentration of Pazopanib can be increased when it is combined with Loperamide. The serum concentration of Loperamide can be increased when it is combined with Lumacaftor. The serum concentration of Loperamide can be decreased when it is combined with Deferasirox. The metabolism of Loperamide can be decreased when combined with Methotrimeprazine. The serum concentration of Loperamide can be increased when it is combined with Cobicistat. The serum concentration of Loperamide can be increased when it is combined with Simeprevir. The serum concentration of Loperamide can be increased when it is combined with Mifepristone. The serum concentration of Ranolazine can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Bortezomib. The serum concentration of Bosutinib can be increased when it is combined with Loperamide.