Fenbendazole-d3 is a deuterium labeled Fenbendazole. Fenbendazole-d3 is a HIF-1alpha agonist and activates the HIF-1alpha-related GLUT1 pathway. Fenbendazole is an orally active benzimidazole anthelmintic agent, with a broad antiparasitic range. Fenbendazole is a microtubule destabilizing agent. Fenbendazole causes cell-cycle arrest and mitotic cell death, and has antitumor activity in mice xenografted with wild-type p53[1][2][3][4].