Who are Adjuvant letrozole (postmenopausal women)'s main competitors?

Direct comparators (same drug class / molecular target / therapeutic area): Kisqali, Aromasin, Femara, Arimidex, ANASTROZOLE, Actinex.

How often does this brief refresh?

Every 30 minutes from primary sources (FDA, EMA, MHRA, PMDA, ClinicalTrials.gov, USPTO). Subscribe to the RSS feed below for push alerts.

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Last reviewed 2026-05-17 · How we verify

Adjuvant letrozole (postmenopausal women) — Competitive Intelligence Brief

Name: Drug Landscape Pharmaceutical Database
Creator: Drug Landscape
Published: 2026-01-01
License: https://creativecommons.org/licenses/by/4.0/

Adjuvant letrozole (postmenopausal women) (adjuvant-letrozole-postmenopausal-women) competitive landscape: 6 comparators, recent regulatory actions, upcoming PDUFA, patent timeline. Class: aromatase inhibitor. Area: Oncology.

marketed aromatase inhibitor aromatase Oncology Live · refreshed every 30 min

Target snapshot

Adjuvant letrozole (postmenopausal women) (adjuvant-letrozole-postmenopausal-women) — Pfizer.

Comparator set (6 drugs)

Auto-detected by same drug class / molecular target / therapeutic area, ranked by phase + recency. Override with ?vs=slug1,slug2,….

Drug	Generic	Sponsor	Phase	Class	Target	Approval / PDUFA
Adjuvant letrozole (postmenopausal women) TARGET	adjuvant-letrozole-postmenopausal-women	Pfizer	marketed	aromatase inhibitor	aromatase
Kisqali	ribociclib	Novartis	marketed	CDK4/6 inhibitor; aromatase inhibitor	Cyclin-dependent kinase (CDK) 4 and 6; aromatase enzyme	2017-01-01
Aromasin	exemestane	Pfizer	marketed	Aromatase Inhibitor [EPC]	Aromatase	1999-01-01
Femara	letrozole	Novartis AG	marketed	Aromatase Inhibitor [EPC]	aromatase enzyme	1997-07-25
Arimidex	anastrozole	AstraZeneca	marketed	Aromatase inhibitor	Aromatase enzyme	1995-12-27
ANASTROZOLE	ANASTROZOLE		marketed	Aromatase Inhibitor [EPC]	aromatase	1995-01-01
Actinex	MASOPROCOL		marketed	masoprocol	Aromatase	1992-01-01

Recent regulatory actions (last 90 days)

No regulatory actions in the last 90 days for this set.

Upcoming PDUFA dates (next 180 days)

No PDUFA dates in the next 180 days for this set.

Patent timeline (forward window)

No upcoming patent expiries for this set.

Sponsor landscape (aromatase inhibitor class)

Pfizer · 1 drug in this class
Trans Tasman Radiation Oncology Group · 1 drug in this class

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Cite this brief

Drug Landscape (2026). Adjuvant letrozole (postmenopausal women) — Competitive Intelligence Brief. https://druglandscape.com/ci/adjuvant-letrozole-postmenopausal-women. Accessed 2026-05-17.

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