Repurposing niclosamide for COVID-19: Synergistic strategies of nanotechnology and novel materials to enhance antiviral efficacy.

The persistent prevalence of COVID-19 and its emerging variants continues to threaten global health security. While most of these viruses have been controlled through medications or vaccines, the increasing number of SARS-CoV-2 variants and the inequitable access to vaccines across nations remain significant challenges for epidemiological management. Niclosamide, an FDA-approved anthelmintic drug, exhibits broad-spectrum antitumor, antibacterial, and antiviral properties, yet suffers from poor bioavailability. Repurposing niclosamide in combination with advanced material technologies may offer a promising therapeutic strategy. To optimize its future clinical applications, we summarize the antiviral mechanisms of niclosamide and emphasize strategies such as nanotechnology and novel material design to enhance its bioavailability and stability. Additionally, we discuss the latest clinical trial outcomes of niclosamide. Looking ahead, with the ongoing advancements in material synthesis, the synergistic integration of nano-hybridization and innovative material systems for niclosamide is poised to become a pivotal tool in epidemiological management and combating viral threats, providing an innovative, accessible, and cost-effective solution for pandemic control.