RELISTOR vs ZIMHI

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated June 7, 2026·How we rate

Possible drug interaction. RELISTOR and ZIMHI 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	RELISTOR	ZIMHI
Rating	New	New
Pharmacy pays	—	$4.41 /mL
Type	RX	RX
Active ingredient	METHYLNALTREXONE BROMIDE	NALOXONE HYDROCHLORIDE
Manufacturer	Salix	Zmi Pharma
Dosage forms	Injectable, Tablet	Injectable
Drug class	Opioid Antagonist	Opioid Antagonist
Boxed warning	None	None
Half-life	—	30 to 81 minutes (mean 64 ± 12 minutes)
Treats	Constipation	Opioid-Related Disorders, Respiration Disorders, Septic Shock

relistor zimhi

Rating

New

Pharmacy pays

—

$4.41 /mL

Type

Active ingredient

METHYLNALTREXONE BROMIDE

NALOXONE HYDROCHLORIDE

Manufacturer

Salix

Zmi Pharma

Dosage forms

Injectable, Tablet

Injectable

Drug class

Opioid Antagonist

Boxed warning

None

Half-life

—

30 to 81 minutes (mean 64 ± 12 minutes)

Treats

Constipation

Opioid-Related Disorders, Respiration Disorders, Septic Shock

Frequently asked questions

What is the difference between Relistor and Zimhi?

Relistor contains Methylnaltrexone Bromide, while Zimhi contains Naloxone 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.