Recent Updates
Recently added Catalysts

Tazarotene

Phase 4FDA approved

Idiopathic Pulmonary Fibrosis | Small molecule | Respiratory |GRI Bio, Inc.|Trials Updated: Oct 30, 2025

Tazarotene development status

FDA approval on record Dec 18, 2019 as Arazlo
Approval holderBausch
ApplicationNDA211882
Highest phase Phase 4 run by Allergan (NCT00834210)
Phase scored for GRIPhase 2
Registered trials 2 across 2 sponsors since Feb 2009

Label indication ARAZLO ® (tazarotene) lotion, 0.045% is indicated for the topical treatment of acne vulgaris in patients 9 years of age and older. ARAZLO is a retinoid indicated for the topical treatment of acne vulgaris in patients 9 years of age and older. ( 1 ) FDA label

Tazarotene target and mechanism

Molecular targetRARG, RARB, RARA
Target classAgonist
ModalitySmall molecule

Also known as Tazarotene (GRI-0621)

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

RandomizedDouble-BlindCONTROLLEDDMC
Total Trials1
Total Enrollment35

FDA Designations

No designations recorded

Tazarotene clinical trials

Tazarotene · 1 trial · 2 indications

Phase 2 1
NCT06331624Biomarker Modulation and the Inhibition of NKT1 Cells by Oral GRI-0621 in Patients With IPFIdiopathic Pulmonary Fibrosis
COMPLETED35 Analytics
PHASE2COMPLETED
Biomarker Modulation and the Inhibition of NKT1 Cells by Oral GRI-0621 in Patients With IPF
Idiopathic Pulmonary FibrosisUnlock trial analytics

Study Endpoints

Primary Endpoints

Safety and Tolerability of oral GRI-0621
12 Weeks

General overall safety and tolerability of oral GRI-0621 as compared to placebo will be assessed by evaluating the following safety parameters: * Adverse events (occurrence and type) * Clinical Laboratory Measurements (normal/abnormal) * Vital signs (normal/abnormal)

Secondary Endpoints

Change from baseline biomarkers
12 Weeks
Plasma concentrations of GRI-0621
12 Weeks
Pharmacodynamics of GRI-0621 in blood (Study Population)
6 Weeks and 12 Weeks
Unlock Study Endpoints

Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
GRI-0621EXPERIMENTALGRI-0621 (tazarotene) 4.5mg, administered orally once daily (QD)
PlaceboEXPERIMENTALPlacebo 4.5mg, administered orally once daily (QD)

Interventions

NameTypeDescription
Tazarotene (GRI-0621)DRUGOral 4.5mg soft gel capsule
PlaceboDRUGOral 4.5mg soft gel capsule
Unlock Study Design Details

Eligibility Criteria

Age Range40 Years to 85 Years
SexALL
Healthy VolunteersNo
Study Sites16

Inclusion Criteria: 1. Male or female subjects 40 through 85 years of age, inclusive. 2. Confirmed diagnosis of IPF with clinical features consistent with the current clinical practice guidelines for IPF. 3. FVC \> 50% predicted value within 4 weeks of Screening. 4. FEV1/FVC ratio \> 0.65 within 4 ...

Countries:United StatesAustraliaUnited Kingdom
Unlock Eligibility Criteria

Frequently asked questions about Tazarotene

What is Tazarotene used for in idiopathic pulmonary fibrosis?

Tazarotene is being developed as an oral treatment for idiopathic pulmonary fibrosis, a progressive scarring disease of the lungs. In this program it is studied under the name GRI-0621. It is an investigational small molecule and is not approved for idiopathic pulmonary fibrosis.

What does Tazarotene target?

Tazarotene targets the retinoic acid receptors RARA, RARB, and RARG, where it acts as an agonist. By activating these receptors, the drug is designed to modulate biomarkers and inhibit NKT1 cells, a mechanism being explored in idiopathic pulmonary fibrosis.

Who is developing Tazarotene for idiopathic pulmonary fibrosis?

GRI Bio, Inc., which trades under the ticker GRI, is developing Tazarotene for idiopathic pulmonary fibrosis under the designation GRI-0621. The company is the sponsor of the clinical program evaluating the oral small molecule in this indication.

What phase is Tazarotene in for idiopathic pulmonary fibrosis?

Tazarotene is in Phase 2 development for idiopathic pulmonary fibrosis as GRI-0621. The program's Phase 2 trial has been completed. The drug is investigational and has not been approved for idiopathic pulmonary fibrosis.

What clinical trials is Tazarotene in for IPF?

Tazarotene has been evaluated in the Phase 2 trial NCT06331624, titled Biomarker Modulation and the Inhibition of NKT1 Cells by Oral GRI-0621 in Patients With IPF. The completed trial enrolled 35 participants across the United States, Australia, and the United Kingdom.

Is Tazarotene the same as GRI-0621?

Yes, GRI-0621 is the development name used by GRI Bio, Inc. for Tazarotene in idiopathic pulmonary fibrosis. Searches for either name refer to the same oral small molecule retinoic acid receptor agonist being studied in the Phase 2 IPF program.