FDA Approves Procysbi for Nephropathic Cystinosis

New Drug Approvals

CYSTAGON® (cysteamine bitartrate) structural formula illustration

Cysteamine bitartrate

April 30, 2013 — The U.S. Food and Drug Administration today approved Procysbi (cysteamine bitartrate) for the management of nephropathic cystinosis in children and adults. Procysbi was granted orphan product designation because it is intended to treat a rare disease or condition.

Cystinosis is a rare genetic condition that affects an estimated 500 patients in the United States and about 3,000 patients worldwide. Fatal if not treated in early childhood, cystinosis causes a protein building block called cystine to build up in every cell of the body. The buildup of cystine causes kidney problems, which can cause the body to lose too much sugar, proteins and salts through the urine. Cystinosis may lead to slow body growth and small stature, weak bones and developing and worsening kidney failure. There are three types of cystinosis, the most severe being nephropathic cystinosis, which severely damages the kidneys.

Currently the FDA…

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