FEMRING vs MENOSTAR

Independent side-by-side comparison.

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

Possible drug interaction. FEMRING and MENOSTAR 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	FEMRING	MENOSTAR
Rating	New	New
Pharmacy pays	$6.55 /g	$6.55 /g
Type	RX	RX
Active ingredient	ESTRADIOL ACETATE	ESTRADIOL
Manufacturer	Millicent Mfg Pr	Bayer Hlthcare
Dosage forms	Ring	Patch
Drug class	Estrogen	Estrogen
Boxed warning	Boxed warning	Boxed warning
Treats	Breast Neoplasms, Hypogonadism, Premature Menopause	Breast Neoplasms, Hypogonadism, Premature Menopause

femring menostar

Rating

New

Pharmacy pays

$6.55 /g

Type

Active ingredient

ESTRADIOL ACETATE

ESTRADIOL

Manufacturer

Millicent Mfg Pr

Bayer Hlthcare

Dosage forms

Ring

Patch

Drug class

Estrogen

Boxed warning

Treats

Breast Neoplasms, Hypogonadism, Premature Menopause

Frequently asked questions

Which is cheaper, Femring or Menostar?

Pharmacies pay about the same to acquire either one — roughly $6.55 per gm, per the CMS NADAC survey. That is not what you will be charged: your price is set by your insurer and the pharmacy, not by what the drug cost them.

What is the difference between Femring and Menostar?

Femring contains Estradiol Acetate, while Menostar contains Estradiol — 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.