What is the best aromatase inhibitor for breast neoplasms?

By our independent recall-safety rating — not an efficacy measure — exemestane ranks highest among Aromatase Inhibitor drugs used for breast neoplasms. Always consult a professional.

Which aromatase inhibitor drugs treat breast neoplasms?

pharmaranks lists 4 Aromatase Inhibitor products used for breast neoplasms, per NIH RxClass drug-classification data — each independently rated and ranked above.

How are these ranked?

By our independent score, currently based on FDA regulatory recall-safety data (the methodology blends additional sources as they come online). See the How we rate page.

Best Aromatase Inhibitor for breast neoplasms

Top-rated pick: Exemestane — pharmaranks score 72/100, the highest of the 4 Aromatase Inhibitor drugs used for breast neoplasms, ranked by our independent FDA recall-safety score. Compare them with all treatments for breast neoplasms or the full Aromatase Inhibitor class. Not medical advice — always consult a professional.

Quick answer: Of the 4 aromatase inhibitor drugs we rate for breast neoplasms, all are available as lower-cost generics, and most are tablet. Our ranking reflects each drug’s FDA recall-safety record — not clinical effectiveness for breast neoplasms; the right choice depends on your situation, so confirm it with your prescriber.

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

Other drug classes for breast neoplasms

Best estrogen Best androgen Best nucleoside metabolic inhibitor Best anthracycline topoisomerase inhibitor Best gonadotropin releasing hormone receptor agonist Best folate analog metabolic inhibitor Best progestin Best kinase inhibitor

Top aromatase inhibitor for breast neoplasms: 1. Exemestane · 2. Arimidex · 3. Femara

Best-rated Aromatase Inhibitor for breast neoplasms, ranked by pharmaranks score
#	Drug	Rating	Type	Form	Generic?	Pharmacy pays
1	Exemestane	72/100	Prescription	Tablet	Generic	$18	View →
2	Arimidex	70/100	Prescription	Tablet	Generic	$4	View →
3	Femara	70/100	Prescription	Tablet	Generic	$4	View →
4	Aromasin	64/100	Prescription	Tablet	Generic	$18	View →

Full ranking · 4 drugs

#1 of 5 in Aromatase Inhibitor

exemestane

PrescriptionFDA-sourced

72/100

Exemestane is an aromatase inhibitor used to treat Breast Neoplasms.

(4 data points)

aromatase inhibitorbreast neoplasms

Pharmacy pays

~$18.36 /30

Save up to 77% in class

View details →

#3 of 5 in Aromatase Inhibitor

arimidex

PrescriptionFDA-sourced

70/100

Arimidex (Anastrozole) is an aromatase inhibitor used to treat Breast Neoplasms.

(1 data points)

aromatase inhibitorbreast neoplasms

Pharmacy pays

~$4.15 /30

View details →

#3 of 5 in Aromatase Inhibitor

femara

PrescriptionFDA-sourced

70/100

Femara (Letrozole) is an aromatase inhibitor used to treat Breast Neoplasms.

(13 data points)

aromatase inhibitorbreast neoplasms

Pharmacy pays

~$4.50 /30

Save up to 8% in class

View details →

aromasin

PrescriptionFDA-sourced

64/100

Aromasin (Exemestane) is an aromatase inhibitor used to treat Breast Neoplasms.

(61 data points)

aromatase inhibitorbreast neoplasms

Pharmacy pays

~$18.36 /30

Save up to 77% in class

View details →

Frequently asked

What is the best aromatase inhibitor for breast neoplasms?: By our independent recall-safety rating — not an efficacy measure — exemestane ranks highest among Aromatase Inhibitor drugs used for breast neoplasms. Always consult a professional.
Which aromatase inhibitor drugs treat breast neoplasms?: pharmaranks lists 4 Aromatase Inhibitor products used for breast neoplasms, per NIH RxClass drug-classification data — each independently rated and ranked above.
How are these ranked?: By our independent score, currently based on FDA regulatory recall-safety data (the methodology blends additional sources as they come online). See the How we rate page.