SPL Set ID: 064fb48d-aa34-4e52-9295-10f2ca4c77dc

Penicillamine is a chelating agent used in the treatment of Wilson's disease. It is also used to reduce cystine excretion in cystinuria and to treat patients with severe, active rheumatoid arthritis unresponsive to conventional therapy (see INDICATIONS ). It is 3-mercapto-D-valine. It is a white, or practically white, crystalline powder, freely soluble in water, slightly soluble alcohol, insoluble in chloroform and in ether. Although its configuration is D, it is levorotatory as usually measured: [α] 25°= -62.5° ± 2° (c = 1, 1N NaOH), D calculated on a dried basis. The empirical formula is C 5 H 11 NO 2 S, giving it a molecular weight of 149.21. The structural formula is: It reacts readily with formaldehyde or acetone to form a thiazolidine-carboxylic acid. Penicillamine Capsules, USP for oral administration contain 250 mg of penicillamine. Each capsule contains the following inactive ingredients: lactose monohydrate, magnesium stearate, D&C yellow no. 10, gelatin and titanium dioxide. The imprinting ink contains shellac, dehydrated alcohol, isopropyl alcohol, butyl alcohol, propylene glycol, strong ammonia solution, black iron oxide, potassium hydroxide and purified water. Image