FIRMAGON vs THEELIN

Independent side-by-side comparison.

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

Possible drug interaction. FIRMAGON and THEELIN 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	FIRMAGON	THEELIN
Rating	72/100	New
Pharmacy pays	—	—
Type	RX	RX
Active ingredient	DEGARELIX ACETATE	ESTRONE
Manufacturer	Ferring Pharms Inc	Parkedale
Dosage forms	Kit	Injectable
Drug class	—	—
Boxed warning	None	None
Treats	Prostatic Neoplasms	Breast Neoplasms, Hypogonadism, Premature Menopause

firmagon theelin

Rating

72/100

New

Pharmacy pays

—

Type

Active ingredient

DEGARELIX ACETATE

ESTRONE

Manufacturer

Ferring Pharms Inc

Parkedale

Dosage forms

Kit

Injectable

Drug class

—

Boxed warning

None

Treats

Prostatic Neoplasms

Breast Neoplasms, Hypogonadism, Premature Menopause

Frequently asked questions

What is the difference between Firmagon and Theelin?

Firmagon contains Degarelix Acetate, while Theelin contains Estrone — 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.