mTOR inhibitors are a class of drugs that block the activity of the mTOR protein, which plays a crucial role in cell growth, proliferation, and survival. By inhibiting this protein, these drugs can slow down or stop the growth of certain types of cancer cells and are also used in treating conditions like tuberous sclerosis and organ transplant rejection. Common examples of mTOR inhibitors include everolimus and temsirolimus. These medications are often used in combination with other therapies to enhance their effectiveness. While they can be beneficial, mTOR inhibitors may also have side effects, such as increased risk of infections and metabolic changes.