Small molecule inhibitors are compounds that can interfere with specific biological processes, often by blocking the activity of proteins involved in diseases. They are typically low molecular weight substances that can easily enter cells and target enzymes or receptors, making them valuable in drug development for conditions like cancer and autoimmune diseases. These inhibitors work by binding to the target protein, preventing it from functioning normally. This action can disrupt disease progression and promote healing. Small molecule inhibitors are a key focus in pharmacology and are used in various therapeutic areas, including oncology and infectious diseases.