Abstract: Described herein are methods of treating a tumor by contacting the tumor with a therapeutic agent encapsulated in a first nanoemulsion and exposing the tumor to a first ultrasonic radiation of less than 300 kHz to the tumor. In some aspects, the tumor can be contacted with a second nanoemulsion. In some aspects, the second emulsion can be injected directly into the tumor via intratumoral injection before exposing the tumor to the first ultrasonic radiation. In some aspects, the tumor is exposed to a second ultrasonic radiation from about 1 to 5 MHz after the first ultrasonic radiation. The methods described herein can be used to treat numerous tumors including, but not limited to, multidrug resistant tumors and inoperable tumors. These tumors may include, but are not limited to, breast cancers, ovarian cancers, pancreatic cancers, or any combination thereof.