In some embodiments, the present disclosure pertains to a method of delivery of an active agent to a target tissue, in a subject in need thereof comprising positioning a high intensity focused ultrasound transducer to enable delivery of ultrasound energy to the target tissue. Such a method comprises energizing the high intensity focused ultrasound transducer； imaging at least a portion of the target tissue； and discontinuing delivery of ultrasound energy. Further, such a method may comprise administering the active agent to the subject under the conditions of thermal stimulation. In another embodiment, the present disclosure relates to a method of treating a tumor in a subject in need thereof comprising administering a therapeutic agent to the subject and providing thermal stimulation to the tumor. In some embodiments, there is provided a method for increasing the efficacy of a therapeutic agent in a target tissue.
