Mesalazine, also known as mesalamine, is a medication often prescribed for the treatment of inflammatory bowel disease. There are several synonyms for this drug, including 5-aminosalicylic acid (5-ASA), mesalazinum, and Pentasa. Other trade names for mesalazine include Asacol, Canasa, and Lialda. These drugs work by reducing inflammation in the intestines and can improve symptoms such as abdominal pain and diarrhea. While mesalazine is generally well-tolerated, it may not be suitable for everyone and can cause side effects. As with all medications, it is important to discuss the risks and benefits with a healthcare provider to determine if mesalazine is the right treatment option.