CUPRIMINE vs PREVACID NAPRAPAC 375 (COPACKAGED)

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated October 7, 2026·How we rate

Possible drug interaction. CUPRIMINE and PREVACID NAPRAPAC 375 (COPACKAGED) 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	PREVACID NAPRAPAC 375 (COPACKAGED)
Rating	74/100	New
Pharmacy pays	—	~$5.20 /30
Type	RX	RX
Active ingredient	PENICILLAMINE	LANSOPRAZOLE AND NAPROXEN
Manufacturer	Valeant Pharm Intl	Takeda Pharms Na
Dosage forms	Capsule	Capsule, Oral pellets, Tablet
Drug class	Antirheumatic Agent	—
Boxed warning	Boxed warning	None
Half-life	—	about 1.5 hours (mean, ±1.0) in healthy adults — the label states the plasma elimination half-life is less than two hours
Treats	Rheumatoid Arthritis, Cystinuria, Hepatolenticular Degeneration	—

cuprimine prevacid naprapac 375 (copackaged)

Rating

74/100

New

Pharmacy pays

—

~$5.20 /30

Type

Active ingredient

PENICILLAMINE

LANSOPRAZOLE AND NAPROXEN

Manufacturer

Valeant Pharm Intl

Takeda Pharms Na

Dosage forms

Capsule

Capsule, Oral pellets, Tablet

Drug class

Antirheumatic Agent

—

Boxed warning

None

Half-life

—

about 1.5 hours (mean, ±1.0) in healthy adults — the label states the plasma elimination half-life is less than two hours

Treats

Rheumatoid Arthritis, Cystinuria, Hepatolenticular Degeneration

—

Frequently asked questions

What is the difference between Cuprimine and Prevacid Naprapac 375 (Copackaged)?

Cuprimine contains Penicillamine, while Prevacid Naprapac 375 (Copackaged) contains Lansoprazole and Naproxen — 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.