CUPRIMINE ®
CAPSULES
(PENICILLAMINE)
DESCRIPTION
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 in alcohol, and insoluble in ether, acetone, benzene, and carbon tetrachloride. 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 C5H11NO2S, 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.
Capsules CUPRIMINE (Penicillamine) for oral administration contain either 125 mg or 250 mg of penicillamine. Each capsule contains the following inactive ingredients: D & C Yellow 10, gelatin, lactose, magnesium stearate, and titanium dioxide. The 125 mg capsule also contains iron oxide.
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