The medicine fenbendazole for humans was initially used as a pet dewormer and for other conditions of animals and pets, but nowadays, studies indicate that fenbendazole might help in human cancer and immune system support treatment. This drug has become an alternative treatment method topic alongside confirmed investigations and subjective opinions that support its efficiency. Concomitantly, people are thinking about it as a complementary alternative to the other available alternatives which they would prefer to their health as a whole as they are provided with more information and research results.