Thiola

Tiopronin, sold under the brand name Thiola, is a medication used to control the rate of cystine precipitation and excretion in the disease cystinuria.[2][3] Due to the rarity of the disorder, tiopronin falls under the classification of an orphan drug. It is somewhat similar to penicillamine in both chemistry and pharmacology.[citation needed] A generic version of tiopronin is available in the United States as of April 2021.[4] ... [wikipedia]