The metabolism of Loperamide can be decreased when combined with Clopidogrel. The metabolism of Loperamide can be decreased when combined with Bupropion. The metabolism of Loperamide can be decreased when combined with Thioridazine. The serum concentration of Loperamide can be decreased when it is combined with Tocilizumab. The metabolism of Loperamide can be decreased when combined with Fluvoxamine. The serum concentration of Loperamide can be decreased when it is combined with St. John's Wort. The metabolism of Loperamide can be increased when combined with Rifampicin. The metabolism of Loperamide can be decreased when combined with Voriconazole. The metabolism of Loperamide can be decreased when combined with Bortezomib. The serum concentration of Loperamide can be increased when it is combined with Palbociclib. The metabolism of Loperamide can be decreased when combined with Crizotinib. The metabolism of Loperamide can be increased when combined with Rifapentine. The metabolism of Loperamide can be decreased when combined with Amiodarone. The serum concentration of Loperamide can be increased when it is combined with Abiraterone. The metabolism of Loperamide can be decreased when combined with Lorcaserin. The metabolism of Loperamide can be decreased when combined with Tamoxifen. The metabolism of Loperamide can be decreased when combined with Teriflunomide. The metabolism of Loperamide can be increased when combined with Phenobarbital. The metabolism of Loperamide can be decreased when combined with Betaxolol. The metabolism of Loperamide can be decreased when combined with Paroxetine. The serum concentration of Edoxaban can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Verapamil. The metabolism of Loperamide can be decreased when combined with Terbinafine. The metabolism of Loperamide can be decreased when combined with Doxycycline. The metabolism of Loperamide can be decreased when combined with Posaconazole. The metabolism of Loperamide can be decreased when combined with Rosiglitazone. The metabolism of Loperamide can be decreased when combined with Eliglustat. The metabolism of Loperamide can be decreased when combined with Doxorubicin. The metabolism of Loperamide can be decreased when combined with Nicardipine. The metabolism of Loperamide can be decreased when combined with Rucaparib. The metabolism of Loperamide can be decreased when combined with Lovastatin. The metabolism of Loperamide can be decreased when combined with Itraconazole. The metabolism of Loperamide can be decreased when combined with Cyclosporine. The metabolism of Loperamide can be decreased when combined with Diltiazem. The metabolism of Loperamide can be decreased when combined with Citalopram. The serum concentration of Loperamide can be increased when it is combined with Lumacaftor. The metabolism of Loperamide can be decreased when combined with Felodipine. The metabolism of Loperamide can be decreased when combined with Cinacalcet. The serum concentration of Bosutinib 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 decreased when it is combined with Peginterferon alfa-2b. The metabolism of Loperamide can be decreased when combined with Lumefantrine. The metabolism of Loperamide can be decreased when combined with Rabeprazole. The metabolism of Loperamide can be decreased when combined with Haloperidol. The metabolism of Loperamide can be decreased when combined with Isavuconazonium. The metabolism of Loperamide can be decreased when combined with Telaprevir. The metabolism of Loperamide can be decreased when combined with Nilotinib. The metabolism of Loperamide can be decreased when combined with Cholecalciferol. The metabolism of Loperamide can be decreased when combined with Idelalisib. The metabolism of Loperamide can be decreased when combined with Celecoxib. The metabolism of Loperamide can be decreased when combined with Methotrimeprazine. The metabolism of Loperamide can be decreased when combined with Indinavir. The metabolism of Loperamide can be decreased when combined with Delavirdine. The metabolism of Loperamide can be increased when combined with Phenytoin. The metabolism of Loperamide can be increased when combined with Rifabutin. The serum concentration of Ledipasvir can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Thiotepa. The serum concentration of Silodosin can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Telithromycin. The metabolism of Loperamide can be decreased when combined with Cocaine. The metabolism of Loperamide can be decreased when combined with Dihydroergotamine. The metabolism of Loperamide can be decreased when combined with Clobazam. The serum concentration of Loperamide can be decreased when it is combined with Bosentan. The metabolism of Loperamide can be decreased when combined with Topiroxostat. The metabolism of Loperamide can be increased when combined with Secobarbital. The metabolism of Loperamide can be decreased when combined with Diphenhydramine. The serum concentration of Rifaximin can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Tranylcypromine. The metabolism of Loperamide can be decreased when combined with Tipranavir. The metabolism of Loperamide can be decreased when combined with Chloroquine. The serum concentration of Vincristine can be increased when it is combined with Loperamide. The serum concentration of Loperamide can be increased when it is combined with Cobicistat. The metabolism of Loperamide can be decreased when combined with Crisaborole. The serum concentration of Loperamide can be increased when it is combined with Ceritinib. The metabolism of Loperamide can be decreased when combined with Lopinavir. The metabolism of Loperamide can be decreased when combined with Dronedarone. The metabolism of Loperamide can be decreased when combined with Atomoxetine. The metabolism of Loperamide can be decreased when combined with Manidipine. The metabolism of Loperamide can be decreased when combined with Sulfisoxazole. The metabolism of Loperamide can be increased when combined with Primidone. The metabolism of Loperamide can be decreased when combined with Nefazodone. 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 Osimertinib. 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 Quinidine. The serum concentration of Conivaptan can be increased when it is combined with Loperamide. The serum concentration of Loperamide can be decreased when it is combined with Enzalutamide. The serum concentration of Loperamide can be decreased when it is combined with Deferasirox. The serum concentration of Loperamide can be increased when it is combined with Vemurafenib. The metabolism of Loperamide can be decreased when combined with Clotrimazole. The metabolism of Loperamide can be decreased when combined with Venlafaxine. The metabolism of Loperamide can be decreased when combined with Saquinavir. The metabolism of Loperamide can be decreased when combined with Cimetidine. The metabolism of Loperamide can be decreased when combined with Nelfinavir. The metabolism of Loperamide can be decreased when combined with Clozapine. The serum concentration of Ranolazine can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Olaparib. The metabolism of Loperamide can be decreased when combined with Fosamprenavir. The metabolism of Loperamide can be decreased when combined with Duloxetine. The metabolism of Loperamide can be decreased when combined with Ziprasidone. The metabolism of Loperamide can be decreased when combined with Chlorpromazine. The metabolism of Loperamide can be decreased when combined with Fluconazole. The serum concentration of Colchicine can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Mirabegron. The serum concentration of Pazopanib can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Ritonavir. The metabolism of Loperamide can be decreased when combined with Boceprevir. The serum concentration of Everolimus can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Lapatinib. The metabolism of Loperamide can be decreased when combined with Imatinib. The serum concentration of Loperamide can be decreased when it is combined with Siltuximab. The serum concentration of Loperamide can be increased when it is combined with Panobinostat. The metabolism of Loperamide can be decreased when combined with Sertraline. The serum concentration of Loperamide can be increased when it is combined with Simeprevir. The metabolism of Loperamide can be decreased when combined with Clomipramine. 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 Sildenafil. The serum concentration of Topotecan can be increased when it is combined with Loperamide. Loperamide may increase the constipating activities of Ramosetron. The serum concentration of Loperamide can be increased when it is combined with Mifepristone. The serum concentration of the active metabolites of Dabigatran etexilate can be increased when Dabigatran etexilate is used in combination with Loperamide. The serum concentration of Brentuximab vedotin can be increased when it is combined with Loperamide. The serum concentration of Loperamide can be increased when it is combined with Dasatinib. The metabolism of Loperamide can be decreased when combined with Isoniazid. The metabolism of Loperamide can be increased when combined with Fosphenytoin. The serum concentration of Naloxegol can be increased when it is combined with Loperamide. The metabolism of Loperamide can be increased when combined with Pentobarbital. The metabolism of Loperamide can be decreased when combined with Sulfamethoxazole. The metabolism of Loperamide can be decreased when combined with Dosulepin.