“…More specifically, the complexation of polymers and CDs offers several advantages, including enhanced encapsulation efficiency and drug loading values than those achieved with pristine drugs [28][29][30][31], improved activity/efficacy [28,30,32,33], superior biocompatibility [32,[34][35][36], greater release profile [20], long-term stability [30,36], improved inhibition efficacy against targeted cells [34], excellent rheological characteristics [34], and alleviated toxic effects [30,33,35]. Similarly, among the advantages that polymer-surfactant systems offer are enhanced bioavailability [37][38][39][40][41], improved drug targeting capability [38,40], ameliorated activity [39,40], long-term stability [40], and superior release profile [40]. Taking into account all the mentioned properties, it is worth examining the combination of biocompatible block copolymers with surfactants and CDs to design and develop complex structures that represent a new class of advanced nose-to-brain drug delivery systems.…”