RIFADIN vs RIMIFON

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 23, 2026·How we rate

Possible drug interaction. RIFADIN and RIMIFON 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	RIFADIN	RIMIFON
Rating	70/100	New
Pharmacy pays	~$20.59 /30	~$96.88 /30
Type	RX	RX
Active ingredient	RIFAMPIN	ISONIAZID
Manufacturer	Sanofi Aventis US	Roche
Dosage forms	Injectable	Injectable, Syrup
Drug class	Rifamycin Antibacterial	Antimycobacterial
Boxed warning	None	None
Treats	Brucellosis, Haemophilus Infections, Legionnaires' Disease	Tuberculosis

rifadin rimifon

Rating

70/100

New

Pharmacy pays

~$20.59 /30

~$96.88 /30

Type

Active ingredient

RIFAMPIN

ISONIAZID

Manufacturer

Sanofi Aventis US

Roche

Dosage forms

Injectable

Injectable, Syrup

Drug class

Rifamycin Antibacterial

Antimycobacterial

Boxed warning

None

Treats

Brucellosis, Haemophilus Infections, Legionnaires' Disease

Tuberculosis

Frequently asked questions

Which is cheaper, Rifadin or Rimifon?

Rifadin costs pharmacies less to acquire — about $20.59 vs $96.88 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 Rifadin and Rimifon?

Rifadin contains Rifampin, while Rimifon contains Isoniazid — 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.