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TPST-1495 twice daily

Phase 1

Solid Tumor | Small molecule | Oncology |Tempest Therapeutics, Inc.|Last Updated: Sep 12, 2025

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment89

FDA Designations

ORPHAN_DRUG

Clinical trial landscape

TPST-1495 twice daily · 1 trial · 9 indications

Phase 1 1
NCT04344795Phase 1a/1b Study of TPST-1495 as a Single Agent and in Combination With Pembrolizumab in Subjects With Solid TumorsSolid Tumor
COMPLETED89 Analytics
PHASE1COMPLETED
Phase 1a/1b Study of TPST-1495 as a Single Agent and in Combination With Pembrolizumab in Subjects With Solid Tumors
Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Determination of maximum tolerated dose and/or recommended Phase 2 dose (RP2D) and optimum dose schedule for TPST-1495 as a single agent and in combination with pembrolizumab
From start of treatment to treatment termination visit, up to 24 months

Determination of maximum tolerated dose and/or recommended Phase 2 dose (RP2D) and optimum dose schedule for TPST-1495 as a single agent and in combination with pembrolizumab based on dose limiting toxicities

Secondary Endpoints

Incidence of adverse events and serious adverse events as assessed by NCI-CTCAE v.5.0
From start of treatment to treatment termination visit, up to 24 months
Assess pharmacokinetics: maximum serum concentration (Cmax)
From start of treatment to treatment termination visit, up to 24 months
Assess pharmacokinetics: area under the serum concentration-time curve (AUC)
From start of treatment to treatment termination visit, up to 24 months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
TPST-1495 monotherapy dose escalationEXPERIMENTALSubjects will receive escalating doses of TPST-1495 administered orally twice daily until maximum tolerated dose is reached or until disease progression
TPST-1495 monotherapy dose and schedule optimizationEXPERIMENTALSubjects will receive alternative TPST-1495 administration schedules until RP2D for the selected schedule is determined or until disease progression.
TPST-1495 monotherapy dose expansionEXPERIMENTALSubjects will receive selected dose regimen from dose and schedule optimization stage until disease progression
TPST-1495 in combination with pembrolizumab dose and schedule optimizationEXPERIMENTALSubjects will receive alternative TPST-1495 administration schedules in combination with pembrolizumab until RP2D for the selected schedule is determined or until disease progression.
TPST-1495 in combination with pembrolizumab dose expansionEXPERIMENTALSubjects will receive selected dose regimen from dose and schedule optimization stage until disease progression

Interventions

NameTypeDescription
TPST-1495 twice dailyDRUGTPST-1495 administered orally twice daily
TPST-1495 once daily or on intermittent scheduleDRUGTPST-1495 administered orally once daily or on intermittent schedule
PembrolizumabDRUGPembrolizumab dosed per label recommendations
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites11

Subjects must meet all the following inclusion criteria to be eligible: 1. Subjects must have a histologically-confirmed malignancy that is metastatic or unresectable for which there is no remaining standard therapy known to confer clinical benefit. While all solid tumor types are eligible for the ...

Countries:United States
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Competitive Landscape -Other Solid Tumors 9 trials (matched to "Solid Tumor")

Frequently asked questions about TPST-1495 twice daily

What is TPST-1495 used for?

TPST-1495 is an investigational small molecule being studied for the treatment of solid tumors, including colorectal cancer, non-small cell lung cancer, squamous cell carcinoma of the head and neck, urothelial carcinoma, endometrial cancer, gastroesophageal junction adenocarcinoma, gastric adenocarcinoma, and solid tumors with PIK3Ca mutations. It is in Phase 1 clinical development.

Who makes TPST-1495?

TPST-1495 is being developed by Tempest Therapeutics, Inc., a biopharmaceutical company traded on the Nasdaq under the ticker symbol TPST. The company is conducting clinical trials of TPST-1495 in patients with solid tumors.

What phase is TPST-1495 in?

TPST-1495 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA. The drug has received orphan drug designation from the FDA for its intended use in solid tumors.

What clinical trials is TPST-1495 in?

TPST-1495 is being studied in a Phase 1a/1b trial (NCT04344795) as a single agent and in combination with pembrolizumab in subjects with solid tumors. This trial has been completed and enrolled 89 participants in the United States.

Is TPST-1495 the same as TPST-1495 twice daily?

Yes, TPST-1495 twice daily refers to the dosing regimen of TPST-1495, which is administered twice daily in clinical trials. The drug is being studied as a single agent and in combination with pembrolizumab for the treatment of solid tumors.