<p>The bitartrate salt of cysteamine is used for the oral treatment of nephropathic cystinosis and cystinuria in children 6 years old and above, and adults.<sup class="text-reference-group"><a class="reference-popover-link" data-content="FDA approved products: PROCYSBI (cysteamine bitartrate) delayed-release oral capsules" href="#reference-L15616">12</a></sup> The hydrochloride salt, used in eye drop preparations, is indicated for the treatment of corneal cystine crystal accumulation in patients with cystinosis.<sup class="text-reference-group"><a class="reference-popover-link" data-content="PRN News Wire: U.S. FDA Approves CYSTADROPS® (Cysteamine Ophthalmic Solution) 0.37%, A New Practical Treatment Option for the Ocular Manifestations of Cystinosis" href="#reference-L15601">9</a>,<a class="reference-popover-link" data-content="FDA Approved Products: Cystadrops (cysteamine solution 0.37%) for ophthalmic use" href="#reference-L15606">10</a></sup></p>