procysbi - Medication Listings

PROCYSBI, for oral administration, is a cystine-depleting agent that lowers the cystine content of cells in patients with nephropathic cystinosis, an inherited defect of lysosomal transport. PROCYSBI contains the bitartrate salt of cysteamine. The chemical name for cysteamine bitartrate is ethanethiol, 2-amino, (2 R ,3 R )-2,3-dihydroxybutanedioate (1:1) (salt). Cysteamine bitartrate is a highly water soluble white powder with a molecular weight of 227.24 and the molecular formula C 2 H 7 NS ∙ C 4 H 6 O 6 . It has the following chemical structure: Each PROCYSBI delayed-release capsule contains either 25 mg cysteamine (equivalent to 74 mg cysteamine bitartrate) or 75 mg cysteamine (equivalent to 221 mg cysteamine bitartrate). Each packet of PROCYSBI delayed-release oral granules contains either 75 mg cysteamine (equivalent to 221 mg cysteamine bitartrate) or 300 mg cysteamine (equivalent to 884 mg cysteamine bitartrate). PROCYSBI delayed release granules contain the following inactive ingredients: Eudragit ® L 30 D-55 (methacrylic acid-ethyl acrylate copolymer), hypromellose, microcrystalline cellulose, purified water, sodium lauryl sulfate, talc, and triethyl citrate. Additionally the capsule shell contains the following inactive ingredients: gelatin, ink (blue and white), and titanium dioxide. Chemical Structure