<unk>  is an anti-inflammatory drug used in the treatment of inflammatory bowel disease. It is sold under the brand names Giazo, Colazal in the US and Colazide in the UK. It is also sold in generic form in the US by several generic manufacturers. It is usually administered as the disodium salt.<unk>  releases mesalazine, also known as 5-aminosalicylic acid, or 5-ASA, in the large intestine. Its advantage over that drug in the treatment of ulcerative colitis is believed to be the delivery of the active agent past the small intestine to the large intestine, the active site of ulcerative colitis. It is in the category of disease-modifying antirheumatic drugs (DMARDs) family of medications. It is unclear exactly how it works.
Balsalazide
Sodium nitroprusside
Nitroglycerin 
Isosorbide dinitrate
Atenolol
Altretamine
Captopril
Ergotamine