Sulfapyridine is a sulfonamide antibacterial. At one time it was commonly referred to as M&B. Sulfapyridine is no longer prescribed for treatment of infections in humans. However, it may be used to treat linear IgA disease. It is a good antibacterial drug, but its water solubility is very pH dependent. Thus there is a risk of crystallization within the bladder or urethra, which could lead to pain or blockage. As with other sulfonamides, there is a significant risk of agranulocytosis, and this, rather than the development of resistance by bacteria, is the main reason for its decline in use. References: Sobolewska B, Deuter C, Zierhut M. Current medical treatment of ocular mucous membrane pemphigoid. Ocul Surf. 2013 Oct;11(4):259-66. doi: 10.1016/j.jtos.2013.02.003. Epub 2013 Jul 9. Review. PubMed PMID: 24112229.

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CAS：144-83-2