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NIH Exploratory/Developmental Grants Phase II (R33)

Funds Exploratory/Developmental Grants Phase II awards, NIH's R33 mechanism.

National Institutes of HealthUnited StatesGrant

The Exploratory/Developmental Grants Phase II (R33) is the R33 award is to provide a second phase for the support for innovative exploratory and development research activities initiated under the R21 mechanism. Although only R21 awardees are generally eligible to apply for R33 support, specific program initiatives may establish eligibility criteria under which applications could be accepted from …

BiotechFood TechHardwareMedtechNeurotech

Each grant below is a distinct funding opportunity with its own eligibility, scope, and deliverables.

NHLBI Early Phase Clinical Trials for Therapeutics and/or Diagnostics for HLBS Disorders (R33 CT Required)
Open

Funds an investigator's own phase I trial in heart, lung, blood or sleep disease — with every regulatory approval already in hand at award.

— pool·133 days
Development of Psychosocial Therapeutic and Preventive Interventions for Mental Disorders (R33)
Open

Funds three years replicating target engagement for a psychosocial intervention and testing whether that engagement tracks clinical change.

— pool·414 days
Early Stage Testing of Pharmacologic or Neuromodulatory Device-based Interventions for the Treatment of Mental Disorders (R33)
Open

Funds early-stage testing of a novel-mechanism drug or a device for mental disorders, designed to show a dose-dependent effect on the target.

— pool·414 days
Enhancing Mechanistic Research on Precision Probiotic Therapies (R33)
Open

Funds mechanistic work on the host biology that decides who responds to a probiotic and who does not.

— pool·279 days
NCCIH Natural Product Early Phase Clinical Trial Award
Open

Funds three years replicating a natural product's effect on its target in people, for teams that have already done the pharmacokinetics work.

$1.1M pool·78 days
Advanced Development and Validation of Emerging Technologies for Basic and Clinical Cancer Research
Open

Funds the development and hard technical validation that turns a working cancer research technology into one other laboratories will actually adopt.

$5.9M pool·75 days
Advanced Development and Validation of Emerging Technologies for Basic and Clinical Cancer Research
Scheduled

Funds further development and rigorous technical validation of a cancer research technology that has already cleared basic feasibility.

$6.6M pool
Catalyze: Enabling Technologies and Transformative Platforms for HLBS Research
Open

Funds rigorously validating a transformative, multi-use platform or technology aimed at heart, lung, blood or sleep disease.

— pool·483 days
Catalyze: Product Definition for Small Molecules, Biologics, and Combination Products - Preliminary Product/Lead Series Identification and Combination Product Prototype
Open

Funds turning a preliminary drug, biologic or combination-product lead into a combination-product prototype for heart, lung, blood or sleep disease.

— pool·483 days
Catalyze: Product Definition Medical Device Prototype Optimization
Open

Funds refining a medical-device prototype's design, assays and research tools for heart, lung, blood or sleep disease.

— pool·483 days
Last verified: 27 Aug 2026Source: grants.nih.gov