CATAFLAM vs EC-NAPROSYN

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 22, 2026·How we rate

Possible drug interaction. CATAFLAM and EC-NAPROSYN 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	CATAFLAM	EC-NAPROSYN
Rating	70/100	New
Pharmacy pays	$0.36 /mL	$0.06 /mL
Type	RX	RX
Active ingredient	DICLOFENAC POTASSIUM	NAPROXEN
Manufacturer	Novartis	Atnahs Pharma US
Dosage forms	Tablet	Tablet, delayed release
Drug class	Nonsteroidal Anti-Inflammatory Drug	Nonsteroidal Anti-Inflammatory Drug
Boxed warning	None	Boxed warning
Half-life	about 2 hours (terminal/elimination half-life; the label's table gives a mean of 2.3 hours in healthy adults, with wide variation between people — 48% coefficient of variation)	about 12 to 17 hours
Treats	Juvenile Arthritis, Rheumatoid Arthritis, Dysmenorrhea	Juvenile Arthritis, Rheumatoid Arthritis, Back Pain

cataflam ec-naprosyn

Rating

70/100

New

Pharmacy pays

$0.36 /mL

$0.06 /mL

Type

Active ingredient

DICLOFENAC POTASSIUM

NAPROXEN

Manufacturer

Novartis

Atnahs Pharma US

Dosage forms

Tablet

Tablet, delayed release

Drug class

Nonsteroidal Anti-Inflammatory Drug

Boxed warning

None

Boxed warning

Half-life

about 2 hours (terminal/elimination half-life; the label's table gives a mean of 2.3 hours in healthy adults, with wide variation between people — 48% coefficient of variation)

about 12 to 17 hours

Treats

Juvenile Arthritis, Rheumatoid Arthritis, Dysmenorrhea

Juvenile Arthritis, Rheumatoid Arthritis, Back Pain

Frequently asked questions

Which is cheaper, Cataflam or Ec-Naprosyn?

Ec-Naprosyn costs pharmacies less to acquire — about $0.06 vs $0.36 per ml, per the CMS NADAC survey. That gap is in the pharmacy's cost of goods, not necessarily in what you pay: your price is set afterwards by your insurer and the pharmacy.

What is the difference between Cataflam and Ec-Naprosyn?

Cataflam contains Diclofenac Potassium, while Ec-Naprosyn contains 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.