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Isradipine

Phase 1

Nicotine Dependence | Small molecule | Psychiatry |Jasper Therapeutics, Inc.|Last Updated: Jun 15, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment78

FDA Designations

No designations recorded

Clinical trial landscape

Isradipine · 1 trial · 6 indications

Early Phase 1 1
NCT03083353Isradipine Enhancement of Virtual Reality Cue Exposure for Smoking CessationNicotine Dependence
COMPLETED78 Analytics
EARLY_PHASE1COMPLETED
Isradipine Enhancement of Virtual Reality Cue Exposure for Smoking Cessation
Nicotine DependenceUnlock trial analytics

Study Endpoints

Primary Endpoints

Craving Intensity to Smoking Cues
The outcome is measured in a medication-free cue exposure session conducted 24 hours after medication administration

Primary outcome measures will be craving intensity to smoking cues based on a scale from 0 (No craving) to 100 (Intense craving).

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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
isradipineEXPERIMENTALParticipants will receive 15mg of immediate release isradipine.
placeboPLACEBO_COMPARATORParticipants will receive a placebo pill identical in appearance to isradipine.

Interventions

NameTypeDescription
IsradipineDRUGIsradipine will be administered 90 minutes prior to the initiation of cue exposure.
Cue ExposureBEHAVIORALParticipants will be exposed to visual smoking cues (i.e., immersive 360 degree video environments) delivered through consumer virtual reality headset and handle cigarette packs to activate and extinguish craving.
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Eligibility Criteria

Age Range18 Years to 65 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: 1. 18-65 years old; 2. Willing and able to provide informed consent, attend all study visits, and comply with the protocol; 3. Daily smoker for at least one year; and 4. Currently smoke an average of at least 5 cigarettes per day. Exclusion Criteria: 1. Current diagnosis of a ...

Countries:United States
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Recent Changes (Last 90 Days)

MEDIUMJul 16, 2026NCT03083353TRIAL_REMOVED: changed
MEDIUMJul 16, 2026NCT03083353TRIAL_REMOVED: changed
MEDIUMJul 16, 2026NCT03083353TRIAL_REMOVED: changed

Frequently asked questions about Isradipine

What is Isradipine used for in nicotine dependence?

Isradipine is a small molecule being studied for nicotine dependence, specifically to help with smoking cessation and smoking reduction. It is being evaluated in a Phase 1 clinical trial that combines the drug with virtual reality cue exposure to address smoking behaviors and craving.

How does Isradipine work?

Isradipine is a small molecule. Its mechanism of action in the context of nicotine dependence is being studied in clinical trials, though the specific molecular target has not been disclosed.

Who makes Isradipine?

Isradipine is being developed by Jasper Therapeutics, Inc., a company traded on the stock exchange under the ticker JSPR.

What phase is Isradipine in?

Isradipine is in Phase 1 clinical development for nicotine dependence. It is an investigational drug and has not been approved by the FDA for this use.

What clinical trials is Isradipine in?

Isradipine is being studied in one completed clinical trial, NCT03083353, titled "Isradipine Enhancement of Virtual Reality Cue Exposure for Smoking Cessation." The trial enrolled 78 participants in the United States and was a randomized, double-blind, placebo-controlled study.

Is Isradipine the same as other names?

Isradipine is the drug name used in clinical development. No alternative names have been reported for this asset.