Kinase inhibitors are a class of drugs designed to block the action of specific enzymes called kinases. These enzymes play a crucial role in various cellular processes, including cell growth, division, and survival. By inhibiting kinases, these drugs can help slow down or stop the progression of certain diseases, particularly various types of cancer. Many kinase inhibitors target specific pathways involved in tumor growth, making them a vital part of targeted therapy. Examples include imatinib for chronic myeloid leukemia and erlotinib for non-small cell lung cancer. Their ability to selectively inhibit kinases helps minimize damage to healthy cells, improving treatment outcomes.