ATHROMBIN-K vs COLAZAL

Independent side-by-side comparison.

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

Possible drug interaction. ATHROMBIN-K and COLAZAL 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	ATHROMBIN-K	COLAZAL
Rating	New	74/100
Pharmacy pays	~$2.57 /30	~$11.02 /30
Type	RX	RX
Active ingredient	WARFARIN POTASSIUM AND WARFARIN SODIUM	BALSALAZIDE DISODIUM
Manufacturer	Pharm Res Assoc	Valeant Pharm Intl
Dosage forms	Tablet	Capsule
Drug class	—	Aminosalicylate
Boxed warning	None	None
Half-life	about 40 hours (the label's effective half-life; range 20 to 60 hours)	—
Treats	—	Ulcerative Colitis

athrombin-k colazal

Rating

New

74/100

Pharmacy pays

~$2.57 /30

~$11.02 /30

Type

Active ingredient

WARFARIN POTASSIUM AND WARFARIN SODIUM

BALSALAZIDE DISODIUM

Manufacturer

Pharm Res Assoc

Valeant Pharm Intl

Dosage forms

Tablet

Capsule

Drug class

—

Aminosalicylate

Boxed warning

None

Half-life

about 40 hours (the label's effective half-life; range 20 to 60 hours)

—

Treats

—

Ulcerative Colitis

Frequently asked questions

Which is cheaper, Athrombin-K or Colazal?

Athrombin-K costs pharmacies less to acquire — about $2.57 vs $11.02 for a 30-count supply, 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 Athrombin-K and Colazal?

Athrombin-K contains Warfarin Potassium and Warfarin Sodium, while Colazal contains Balsalazide Disodium — 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.