KLONOPIN vs ONFI

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 17, 2026·How we rate

Possible drug interaction. KLONOPIN and ONFI 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	KLONOPIN	ONFI
Rating	New	New
Pharmacy pays	~$0.83 /30	~$7.72 /30
Type	RX	RX
Active ingredient	CLONAZEPAM	CLOBAZAM
Manufacturer	Cheplapharm	Lundbeck Pharms LLC
Dosage forms	Tablet	Suspension, Tablet
Drug class	Benzodiazepine	Benzodiazepine
Boxed warning	Boxed warning	Boxed warning
Half-life	about 30 to 40 hours	—
Treats	Bipolar Disorder, Dysarthria, Myoclonic Epilepsies	Seizures, Lennox Gastaut Syndrome

klonopin onfi

Rating

New

Pharmacy pays

~$0.83 /30

~$7.72 /30

Type

Active ingredient

CLONAZEPAM

CLOBAZAM

Manufacturer

Cheplapharm

Lundbeck Pharms LLC

Dosage forms

Tablet

Suspension, Tablet

Drug class

Benzodiazepine

Boxed warning

Half-life

about 30 to 40 hours

—

Treats

Bipolar Disorder, Dysarthria, Myoclonic Epilepsies

Seizures, Lennox Gastaut Syndrome

Frequently asked questions

Which is cheaper, Klonopin or Onfi?

Klonopin costs pharmacies less to acquire — about $0.83 vs $7.72 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 Klonopin and Onfi?

Klonopin contains Clonazepam, while Onfi contains Clobazam — 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.