CUPRIMINE vs ILOSONE SULFA

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated October 11, 2026·How we rate

Possible drug interaction. CUPRIMINE and ILOSONE SULFA 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	ILOSONE SULFA
Rating	74/100	New
Pharmacy pays	—	—
Type	RX	RX
Active ingredient	PENICILLAMINE	ERYTHROMYCIN ESTOLATE AND SULFISOXAZOLE ACETYL
Manufacturer	Valeant Pharm Intl	Lilly
Dosage forms	Capsule	Suspension
Drug class	Antirheumatic Agent	—
Boxed warning	Boxed warning	None
Treats	Rheumatoid Arthritis, Cystinuria, Hepatolenticular Degeneration	—

cuprimine ilosone sulfa

Rating

74/100

New

Pharmacy pays

—

Type

Active ingredient

PENICILLAMINE

ERYTHROMYCIN ESTOLATE AND SULFISOXAZOLE ACETYL

Manufacturer

Valeant Pharm Intl

Lilly

Dosage forms

Capsule

Suspension

Drug class

Antirheumatic Agent

—

Boxed warning

None

Treats

Rheumatoid Arthritis, Cystinuria, Hepatolenticular Degeneration

—

Frequently asked questions

What is the difference between Cuprimine and Ilosone Sulfa?

Cuprimine contains Penicillamine, while Ilosone Sulfa contains Erythromycin Estolate and Sulfisoxazole Acetyl — 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.