VIVITROL vs ZURNAI (AUTOINJECTOR)

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 21, 2026·How we rate

Possible drug interaction. VIVITROL and ZURNAI (AUTOINJECTOR) 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	VIVITROL	ZURNAI (AUTOINJECTOR)
Rating	70/100	New
Pharmacy pays	~$36.35 /30	—
Type	RX	RX
Active ingredient	NALTREXONE	NALMEFENE HYDROCHLORIDE
Manufacturer	Alkermes Inc	Knoa Pharma
Dosage forms	Kit	Injectable
Drug class	Opioid Antagonist	Opioid Antagonist
Boxed warning	None	None
Treats	Alcoholism, Opioid-Related Disorders, Drug Overdose	Opioid-Related Disorders, Respiration Disorders, Drug Overdose

vivitrol zurnai (autoinjector)

Rating

70/100

New

Pharmacy pays

~$36.35 /30

—

Type

Active ingredient

NALTREXONE

NALMEFENE HYDROCHLORIDE

Manufacturer

Alkermes Inc

Knoa Pharma

Dosage forms

Kit

Injectable

Drug class

Opioid Antagonist

Boxed warning

None

Treats

Alcoholism, Opioid-Related Disorders, Drug Overdose

Opioid-Related Disorders, Respiration Disorders, Drug Overdose

Frequently asked questions

What is the difference between Vivitrol and Zurnai (Autoinjector)?

Vivitrol contains Naltrexone, while Zurnai (Autoinjector) contains Nalmefene Hydrochloride — 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.