Methods for reducing platinum drug-induced toxicity in a cell expressing Organic Cation Transporter 2 (OCT2), methods for reducing platinum drug-induced toxicity in a subject, methods for treating cancer, methods for increasing efficacy of platinum drug treatment in a subject, and pharmaceutical compositions are described. The described methods and compositions include an OCT2 inhibitor where the OCT2 inhibitor is buflomedil or a salt thereof, dolutegravir or a salt thereof, contains an imidazole, or is miconazole or a salt thereof.
