ELSPAR vs PURINETHOL

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 18, 2026·How we rate

Possible drug interaction. ELSPAR and PURINETHOL 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	ELSPAR	PURINETHOL
Rating	70/100	New
Pharmacy pays	—	~$29.79 /30
Type	RX	RX
Active ingredient	ASPARAGINASE	MERCAPTOPURINE
Manufacturer	Merck	Stason Pharms
Dosage forms	Injectable	Tablet
Drug class	—	—
Boxed warning	None	None
Treats	Cholelithiasis, Lymphoma, Precursor Cell Lymphoblastic Leukemia-Lymphoma	Non-Hodgkin Lymphoma, B-Cell Chronic Lymphocytic Leukemia, Precursor Cell Lymphoblastic Leukemia-Lymphoma

elspar purinethol

Rating

70/100

New

Pharmacy pays

—

~$29.79 /30

Type

Active ingredient

ASPARAGINASE

MERCAPTOPURINE

Manufacturer

Merck

Stason Pharms

Dosage forms

Injectable

Tablet

Drug class

—

Boxed warning

None

Treats

Cholelithiasis, Lymphoma, Precursor Cell Lymphoblastic Leukemia-Lymphoma

Non-Hodgkin Lymphoma, B-Cell Chronic Lymphocytic Leukemia, Precursor Cell Lymphoblastic Leukemia-Lymphoma

Frequently asked questions

What is the difference between Elspar and Purinethol?

Elspar contains Asparaginase, while Purinethol contains Mercaptopurine — 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.