Who are Placebo + Letrozole/Anastrozole'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.

How do I get this as a recurring report?

Subscribe to /feed/ci/placebo-letrozole-anastrozole.xml in any RSS reader (Feedly, Inoreader, NewsBlur). Every regulatory action, trial readout, or patent event lands in your feed automatically.

Last reviewed 2026-05-18 · How we verify

Placebo + Letrozole/Anastrozole — Competitive Intelligence Brief

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

Placebo + Letrozole/Anastrozole (Placebo + Letrozole/Anastrozole) competitive landscape: 6 comparators, recent regulatory actions, upcoming PDUFA, patent timeline. Class: Aromatase inhibitor. Area: Oncology.

phase 3 Aromatase inhibitor Aromatase Oncology Small molecule Live · refreshed every 30 min

Target snapshot

Placebo + Letrozole/Anastrozole (Placebo + Letrozole/Anastrozole) — Xuanzhu Biopharmaceutical Co., Ltd.. Letrozole and Anastrozole are aromatase inhibitors that block the enzyme responsible for converting androgens to estrogens, thereby reducing estrogen levels in the body.

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
Placebo + Letrozole/Anastrozole TARGET	Placebo + Letrozole/Anastrozole	Xuanzhu Biopharmaceutical Co., Ltd.	phase 3	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)

AstraZeneca · 4 drugs in this class
Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh · 2 drugs in this class
Eastern Virginia Medical School · 1 drug in this class
Genor Biopharma Co., Ltd. · 1 drug in this class
Gynaecologisch Oncologisch Centrum Zuid · 1 drug in this class
IRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro, Genoa, Italy · 1 drug in this class
IVI Madrid · 1 drug in this class
Jiangsu HengRui Medicine Co., Ltd. · 1 drug in this class
Lumara Health, Inc. · 1 drug in this class
Pfizer · 1 drug in this class

Subscribe to ongoing alerts

Push every new event for this competitive set into your RSS reader, IFTTT/Zapier workflow, or email digest:

Cite this brief

Drug Landscape (2026). Placebo + Letrozole/Anastrozole — Competitive Intelligence Brief. https://druglandscape.com/ci/placebo-letrozole-anastrozole. Accessed 2026-05-18.

Build your own brief

Pick any drug + add comparators:

https://druglandscape.com/ci/{slug} — auto-detected competitors
https://druglandscape.com/ci/{slug}?vs=drug1,drug2,drug3 — explicit comparators
Brand names auto-resolve: /ci/keytruda → 301 → /ci/pembrolizumab