The metabolism of Loperamide can be decreased when combined with Thiotepa. The metabolism of Loperamide can be decreased when combined with Desipramine. The metabolism of Loperamide can be decreased when combined with Losartan. The serum concentration of Loperamide can be increased when it is combined with Darunavir. The metabolism of Loperamide can be decreased when combined with Isoniazid. The serum concentration of Afatinib can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Lorcaserin. The metabolism of Loperamide can be decreased when combined with Methotrimeprazine. The metabolism of Loperamide can be decreased when combined with Verapamil. The serum concentration of Loperamide can be increased when it is combined with Quazepam. The serum concentration of Doxorubicin can be increased when it is combined with Loperamide. The serum concentration of Loperamide can be increased when it is combined with Simeprevir. The metabolism of Loperamide can be decreased when combined with Posaconazole. The metabolism of Loperamide can be decreased when combined with Diphenhydramine. The serum concentration of Colchicine can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Clarithromycin. The serum concentration of Loperamide can be increased when it is combined with Aprepitant. The metabolism of Loperamide can be decreased when combined with Rucaparib. The metabolism of Loperamide can be decreased when combined with Lapatinib. The metabolism of Loperamide can be increased when combined with Pentobarbital. The serum concentration of Loperamide can be increased when it is combined with Fosaprepitant. The serum concentration of Loperamide can be decreased when it is combined with St. John's Wort. The serum concentration of Loperamide can be increased when it is combined with Netupitant. The metabolism of Loperamide can be decreased when combined with Isavuconazonium. Loperamide may increase the constipating activities of Ramosetron. The metabolism of Loperamide can be decreased when combined with Fluoxetine. The serum concentration of Loperamide can be decreased when it is combined with Tocilizumab. The metabolism of Loperamide can be decreased when combined with Sorafenib. The metabolism of Loperamide can be decreased when combined with Chlorpromazine. The serum concentration of Everolimus can be increased when it is combined with Loperamide. The serum concentration of Ranolazine can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Cocaine. The metabolism of Loperamide can be decreased when combined with Indinavir. The serum concentration of Loperamide can be increased when it is combined with Dasatinib. The serum concentration of Loperamide can be increased when it is combined with Luliconazole. The serum concentration of Naloxegol 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 Clemastine. The serum concentration of Loperamide can be decreased when it is combined with Enzalutamide. The metabolism of Loperamide can be decreased when combined with Darifenacin. The serum concentration of Silodosin can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Atomoxetine. The serum concentration of Bosutinib can be increased when it is combined with Loperamide. The serum concentration of Loperamide can be decreased when it is combined with Bosentan. The serum concentration of Loperamide can be increased when it is combined with Vemurafenib. The metabolism of Loperamide can be decreased when combined with Nefazodone. The serum concentration of Loperamide can be increased when it is combined with Lumacaftor. The metabolism of Loperamide can be decreased when combined with Chloroquine. The serum concentration of Rifaximin can be increased when it is combined with Loperamide. The serum concentration of Loperamide can be increased when it is combined with Osimertinib. The metabolism of Loperamide can be decreased when combined with Metoprolol. The metabolism of Loperamide can be decreased when combined with Telithromycin. The metabolism of Loperamide can be decreased when combined with Tamoxifen. The metabolism of Loperamide can be decreased when combined with Amiodarone. The metabolism of Loperamide can be decreased when combined with Sulfamethoxazole. The metabolism of Loperamide can be decreased when combined with Erythromycin. The serum concentration of Loperamide can be decreased when it is combined with Siltuximab. The metabolism of Loperamide can be increased when combined with Phenobarbital. The metabolism of Loperamide can be decreased when combined with Duloxetine. The metabolism of Loperamide can be decreased when combined with Fluconazole. The metabolism of Loperamide can be decreased when combined with Doxycycline. The serum concentration of Loperamide can be increased when it is combined with Stiripentol. The metabolism of Loperamide can be decreased when combined with Manidipine. The metabolism of Loperamide can be decreased when combined with Pioglitazone. The therapeutic efficacy of Loperamide can be decreased when used in combination with Sarilumab. The metabolism of Loperamide can be decreased when combined with Itraconazole. The metabolism of Loperamide can be decreased when combined with Mirabegron. The metabolism of Loperamide can be increased when combined with Nevirapine. The metabolism of Loperamide can be decreased when combined with Clotrimazole. The metabolism of Loperamide can be decreased when combined with Thioridazine. The metabolism of Loperamide can be increased when combined with Rifapentine. The metabolism of Loperamide can be decreased when combined with Idelalisib. The metabolism of Loperamide can be increased when combined with Phenytoin. The metabolism of Loperamide can be decreased when combined with Olaparib. The serum concentration of Loperamide can be decreased when it is combined with Mitotane. 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 metabolism of Loperamide can be decreased when combined with Quinine. The metabolism of Loperamide can be decreased when combined with Nilotinib. The metabolism of Loperamide can be decreased when combined with Ticlopidine. The metabolism of Loperamide can be decreased when combined with Lopinavir. The metabolism of Loperamide can be decreased when combined with Ritonavir. The metabolism of Loperamide can be decreased when combined with Sildenafil. The metabolism of Loperamide can be decreased when combined with Dosulepin. The metabolism of Loperamide can be increased when combined with Carbamazepine. The metabolism of Loperamide can be decreased when combined with Bortezomib. The serum concentration of Loperamide can be increased when it is combined with Cobicistat. The metabolism of Loperamide can be decreased when combined with Artemether. The metabolism of Loperamide can be decreased when combined with Bupropion. The metabolism of Loperamide can be decreased when combined with Sertraline. The metabolism of Loperamide can be decreased when combined with Nicardipine. The serum concentration of Vincristine 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 Methadone. The metabolism of Loperamide can be decreased when combined with Ropinirole. The metabolism of Loperamide can be decreased when combined with Clomipramine. The serum concentration of Loperamide can be increased when it is combined with Ceritinib. The metabolism of Loperamide can be decreased when combined with Fluvoxamine. The serum concentration of Ledipasvir can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Lovastatin. The metabolism of Loperamide can be decreased when combined with Ziprasidone. The metabolism of Loperamide can be decreased when combined with Teriflunomide. The metabolism of Loperamide can be decreased when combined with Crizotinib. The serum concentration of Topotecan can be increased when it is combined with Loperamide. The metabolism of Loperamide can be decreased when combined with Clozapine. The metabolism of Loperamide can be decreased when combined with Doxorubicin. The metabolism of Loperamide can be decreased when combined with Atazanavir. The metabolism of Loperamide can be increased when combined with Secobarbital. The metabolism of Loperamide can be decreased when combined with Topiroxostat. The metabolism of Loperamide can be decreased when combined with Terbinafine. The metabolism of Loperamide can be decreased when combined with Tipranavir. The metabolism of Loperamide can be increased when combined with Rifampicin. The metabolism of Loperamide can be decreased when combined with Cimetidine. The metabolism of Loperamide can be decreased when combined with Ketoconazole. The metabolism of Loperamide can be decreased when combined with Paroxetine. The metabolism of Loperamide can be decreased when combined with Dronedarone. The metabolism of Loperamide can be decreased when combined with Clopidogrel. The metabolism of Loperamide can be decreased when combined with Diltiazem. The metabolism of Loperamide can be decreased when combined with Celecoxib. The serum concentration of Edoxaban can be increased when it is combined with Loperamide. The serum concentration of Loperamide can be decreased when it is combined with Dabrafenib. The metabolism of Loperamide can be decreased when combined with Nelfinavir. The metabolism of Loperamide can be decreased when combined with Cyclosporine. The metabolism of Loperamide can be decreased when combined with Voriconazole. The metabolism of Loperamide can be decreased when combined with Irbesartan. The metabolism of Loperamide can be decreased when combined with Cholecalciferol. The metabolism of Loperamide can be decreased when combined with Betaxolol. The metabolism of Loperamide can be decreased when combined with Promazine. The metabolism of Loperamide can be decreased when combined with Delavirdine. The serum concentration of Loperamide can be increased when it is combined with Palbociclib.