Cuprimine is a medication primarily used for the treatment of Wilson's disease, a genetic disorder that causes copper to accumulate in different organs of the body. Cuprimine contains the active ingredient D-penicillamine, which helps remove excess copper from the body. Some common synonyms for Cuprimine include D-pen, D-penicillamine, and penicillamine. While Cuprimine is the brand name of the medication, D-pen and D-penicillamine are the generic names for the drug. Penicillamine is also sometimes used interchangeably with Cuprimine. However, it's important to note that another drug called trientine hydrochloride (also known as Syprine) is also used for the treatment of Wilson's disease and can be considered a synonym for Cuprimine in some cases.