Due primarily to their small size over a huge surface area, carbon nanotubes are being used more frequently in nanomedicine and material chemistry research. They make excellent candidates for use in medicine as drug carriers, contrast agents, biological platforms, and other medical applications because of their characteristics. Evaluation of the hazardous consequences of Carbon Nanotubes (CNTs) is necessary since they may directly or indirectly impact various organs. Oxidative stress, inflammation, the capacity to harm DNA and cell membranes, necrosis, and apoptosis are some of the primary causes of toxicity. Research on CNTs focuses on various animal models, functionalization, delivery methods, concentrations, exposure durations, and a number of other features that have a big impact on toxicity.