The metabolism of Loperamide can be decreased when combined with Paroxetine. The serum concentration of Loperamide can be increased when it is combined with Osimertinib. The metabolism of Loperamide can be decreased when combined with Lorcaserin. The metabolism of Loperamide can be decreased when combined with Thioridazine. The serum concentration of Loperamide can be increased when it is combined with Netupitant. The metabolism of Loperamide can be decreased when combined with Sildenafil. The serum concentration of Ranolazine can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Rucaparib. The serum concentration of Loperamide can be increased when it is combined with Vemurafenib. The serum concentration of Loperamide can be increased when it is combined with Panobinostat. The metabolism of Loperamide can be decreased when combined with Felodipine. The serum concentration of Ledipasvir can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Crisaborole. The serum concentration of Vincristine can be increased when it is combined with Loperamide. Loperamide may increase the constipating activities of Ramosetron. The metabolism of Loperamide can be decreased when combined with Voriconazole. The serum concentration of Loperamide can be increased when it is combined with Ivacaftor. The metabolism of Loperamide can be decreased when combined with Thiotepa. The serum concentration of Naloxegol can be increased when it is combined with Loperamide. 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 serum concentration of Loperamide can be increased when it is combined with Palbociclib. The metabolism of Loperamide can be decreased when combined with Efavirenz. The serum concentration of Loperamide can be increased when it is combined with Abiraterone. The metabolism of Loperamide can be decreased when combined with Promazine. The metabolism of Loperamide can be decreased when combined with Imatinib. The metabolism of Loperamide can be decreased when combined with Clomipramine. The metabolism of Loperamide can be decreased when combined with Fluvoxamine. The metabolism of Loperamide can be decreased when combined with Celecoxib. The metabolism of Loperamide can be decreased when combined with Clozapine. The metabolism of Loperamide can be decreased when combined with Lumefantrine. The metabolism of Loperamide can be decreased when combined with Lovastatin. The metabolism of Loperamide can be decreased when combined with Duloxetine. The metabolism of Loperamide can be decreased when combined with Manidipine. The serum concentration of Edoxaban can be increased when it is combined with Loperamide. The metabolism of Loperamide can be increased when combined with Primidone. The metabolism of Loperamide can be increased when combined with Rifampicin. The metabolism of Loperamide can be decreased when combined with Darifenacin. The serum concentration of Doxorubicin can be increased when it is combined with Loperamide. The serum concentration of Topotecan can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Atomoxetine. The metabolism of Loperamide can be decreased when combined with Amiodarone. The metabolism of Loperamide can be decreased when combined with Dosulepin. The metabolism of Loperamide can be decreased when combined with Trimethoprim. The serum concentration of Loperamide can be decreased when it is combined with Deferasirox. The serum concentration of Bosutinib can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Isavuconazonium. The metabolism of Loperamide can be decreased when combined with Tipranavir. The metabolism of Loperamide can be decreased when combined with Desipramine. The serum concentration of Rifaximin can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Nefazodone. The metabolism of Loperamide can be decreased when combined with Isradipine. The metabolism of Loperamide can be decreased when combined with Eliglustat. The serum concentration of Loperamide can be increased when it is combined with Lumacaftor. The metabolism of Loperamide can be decreased when combined with Irbesartan. The metabolism of Loperamide can be decreased when combined with Ritonavir. The metabolism of Loperamide can be decreased when combined with Crizotinib. The metabolism of Loperamide can be decreased when combined with Boceprevir. The metabolism of Loperamide can be decreased when combined with Clobazam. The metabolism of Loperamide can be decreased when combined with Bortezomib. The metabolism of Loperamide can be decreased when combined with Betaxolol. The serum concentration of Afatinib can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Quinidine. The metabolism of Loperamide can be decreased when combined with Itraconazole. The metabolism of Loperamide can be decreased when combined with Delavirdine. The serum concentration of Loperamide can be increased when it is combined with Darunavir. The serum concentration of Loperamide can be increased when it is combined with Stiripentol. The metabolism of Loperamide can be decreased when combined with Methadone. The metabolism of Loperamide can be decreased when combined with Dronedarone. The metabolism of Loperamide can be increased when combined with Rifabutin. The serum concentration of Silodosin can be increased when it is combined with Loperamide. The serum concentration of Loperamide can be increased when it is combined with Fusidic Acid. The serum concentration of Loperamide can be increased when it is combined with Simeprevir. The serum concentration of Loperamide can be decreased when it is combined with Bosentan. The metabolism of Loperamide can be decreased when combined with Teriflunomide. The metabolism of Loperamide can be decreased when combined with Artemether. The metabolism of Loperamide can be decreased when combined with Saquinavir. The serum concentration of Pazopanib can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Rolapitant. The metabolism of Loperamide can be decreased when combined with Nelfinavir. The metabolism of Loperamide can be decreased when combined with Verapamil. The metabolism of Loperamide can be decreased when combined with Telaprevir. The serum concentration of Brentuximab vedotin can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Methotrimeprazine. The metabolism of Loperamide can be decreased when combined with Isoniazid. The serum concentration of Loperamide can be increased when it is combined with Mifepristone. The metabolism of Loperamide can be increased when combined with Rifapentine. The metabolism of Loperamide can be decreased when combined with Atazanavir. The metabolism of Loperamide can be decreased when combined with Ketoconazole. The serum concentration of Loperamide can be decreased when it is combined with Tocilizumab. The metabolism of Loperamide can be decreased when combined with Lapatinib. The metabolism of Loperamide can be decreased when combined with Clemastine. The metabolism of Loperamide can be decreased when combined with Indinavir. The metabolism of Loperamide can be increased when combined with Secobarbital. The metabolism of Loperamide can be increased when combined with Nevirapine. 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 Ceritinib. The metabolism of Loperamide can be decreased when combined with Losartan. The metabolism of Loperamide can be decreased when combined with Sertraline. The metabolism of Loperamide can be decreased when combined with Ticlopidine. The metabolism of Loperamide can be decreased when combined with Telithromycin. 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 Venlafaxine. The metabolism of Loperamide can be decreased when combined with Chlorpromazine. The metabolism of Loperamide can be decreased when combined with Idelalisib. The serum concentration of Loperamide can be decreased when it is combined with Mitotane. The metabolism of Loperamide can be decreased when combined with Cinacalcet. The therapeutic efficacy of Loperamide can be decreased when used in combination with Sarilumab. The metabolism of Loperamide can be decreased when combined with Ziprasidone. The serum concentration of Loperamide can be increased when it is combined with Dasatinib. The metabolism of Loperamide can be decreased when combined with Citalopram. The metabolism of Loperamide can be decreased when combined with Fosamprenavir. The metabolism of Loperamide can be decreased when combined with Nilotinib. The metabolism of Loperamide can be decreased when combined with Topiroxostat. The serum concentration of Loperamide can be increased when it is combined with Aprepitant. 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 Doxorubicin. The serum concentration of Conivaptan can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Bupropion. The metabolism of Loperamide can be decreased when combined with Midostaurin. The metabolism of Loperamide can be decreased when combined with Clotrimazole. The metabolism of Loperamide can be decreased when combined with Dihydroergotamine. The metabolism of Loperamide can be decreased when combined with Cyclosporine. The metabolism of Loperamide can be increased when combined with Pentobarbital. The serum concentration of Loperamide can be decreased when it is combined with Dabrafenib. The metabolism of Loperamide can be decreased when combined with Quinine. The serum concentration of Loperamide can be decreased when it is combined with Enzalutamide. The metabolism of Loperamide can be decreased when combined with Cimetidine. The metabolism of Loperamide can be decreased when combined with Nicardipine. The serum concentration of Loperamide can be increased when it is combined with Fosaprepitant.