CUPRIMINE vs NULIBRY

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated October 5, 2026·How we rate

Possible drug interaction. CUPRIMINE and NULIBRY are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	CUPRIMINE	NULIBRY
Rating	74/100	New
Pharmacy pays	—	—
Type	RX	RX
Active ingredient	PENICILLAMINE	FOSDENOPTERIN HYDROBROMIDE
Manufacturer	Valeant Pharm Intl	Sentynl Theraps Inc
Dosage forms	Capsule	Injectable
Drug class	Antirheumatic Agent	Cyclic Pyranopterin Monophosphate
Boxed warning	Boxed warning	None
Treats	Rheumatoid Arthritis, Cystinuria, Hepatolenticular Degeneration	Inborn Errors Metal Metabolism

cuprimine nulibry

Rating

74/100

New

Pharmacy pays

—

Type

Active ingredient

PENICILLAMINE

FOSDENOPTERIN HYDROBROMIDE

Manufacturer

Valeant Pharm Intl

Sentynl Theraps Inc

Dosage forms

Capsule

Injectable

Drug class

Antirheumatic Agent

Cyclic Pyranopterin Monophosphate

Boxed warning

None

Treats

Rheumatoid Arthritis, Cystinuria, Hepatolenticular Degeneration

Inborn Errors Metal Metabolism

Frequently asked questions

What is the difference between Cuprimine and Nulibry?

Cuprimine contains Penicillamine, while Nulibry contains Fosdenopterin Hydrobromide — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.