GLEOSTINE vs VALCHLOR

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 22, 2026·How we rate

Possible drug interaction. GLEOSTINE and VALCHLOR 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	GLEOSTINE	VALCHLOR
Rating	70/100	New
Pharmacy pays	—	—
Type	RX	RX
Active ingredient	LOMUSTINE	MECHLORETHAMINE HYDROCHLORIDE
Manufacturer	Azurity	Helsinn
Dosage forms	Capsule	Topical
Drug class	Alkylating Drug	—
Boxed warning	Boxed warning	None
Half-life	about 16 to 48 hours — but note this is the half-life of lomustine's metabolites, not the parent drug	—
Treats	Brain Neoplasms, Colonic Neoplasms, Hodgkin Disease	Hodgkin Disease, Mycosis Fungoides, Neoplasm Metastasis

gleostine valchlor

Rating

70/100

New

Pharmacy pays

—

Type

Active ingredient

LOMUSTINE

MECHLORETHAMINE HYDROCHLORIDE

Manufacturer

Azurity

Helsinn

Dosage forms

Capsule

Topical

Drug class

Alkylating Drug

—

Boxed warning

None

Half-life

about 16 to 48 hours — but note this is the half-life of lomustine's metabolites, not the parent drug

—

Treats

Brain Neoplasms, Colonic Neoplasms, Hodgkin Disease

Hodgkin Disease, Mycosis Fungoides, Neoplasm Metastasis

Frequently asked questions

What is the difference between Gleostine and Valchlor?

Gleostine contains Lomustine, while Valchlor contains Mechlorethamine 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.