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HFA MDI

Phase 3

Asthma | Small molecule | Respiratory |AstraZeneca PLC|Last Updated: Feb 6, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials1
Total Enrollment52

FDA Designations

No designations recorded

Clinical trial landscape

HFA MDI · 1 trial · 1 indication

Phase 3 1
NCT05850494Study to Assess Bronchospasm Potentially Induced by Next-Generation Propellant vs HFA Propellant in an MDI in Participants With Well/Partially Controlled AsthmaAsthma
COMPLETED52 Analytics
PHASE3COMPLETED
Study to Assess Bronchospasm Potentially Induced by Next-Generation Propellant vs HFA Propellant in an MDI in Participants With Well/Partially Controlled Asthma
AsthmaUnlock trial analytics

Study Endpoints

Primary Endpoints

Change From Baseline in Normalized Forced Expiratory Volume in 1 Second (FEV1) Area Under the Curve From 0 to 15 Minutes (AUC0-15 Min) Post-dose
30 minutes prior to dosing and at 5, 15, and 30 minutes post-dose

The change from baseline (30 minutes pre-dose) in normalized FEV1 AUC0-15 min postdose induced by Treatment HFO was compared with Treatment HFA.

Secondary Endpoints

Number of Participants With Bronchospasm Events
30 minutes prior to dosing and at 5 and 15 minutes post-dose
Safety and Tolerability Evaluated in Terms of Adverse Events (AEs)
From screening (Day - 14) to the last dose (day 8) + 7 days
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelCROSSOVER
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Treatment A: HFO propellant only MDIEXPERIMENTALTest arm, 4 inhalations per dose
Treatment B: HFA propellant only MDIACTIVE_COMPARATORReference arm, 4 inhalations per dose

Interventions

NameTypeDescription
HFA MDIDRUG* Dose formulation: MDI * Unit dose strength(s): Reference (propellant only) * Dosage Level: 4 inhalations, single dose * Route of administration: Oral inhalation * Participants will receive treatment A in 1 or 2 possible sequences AB or BA
HFO MDIDRUG* Dose formulation: MDI * Unit dose strength(s): Experimental (propellant only) * Dosage Level: 4 inhalations, single dose * Route of administration: Oral inhalation * Participants will receive treatment A in 1 or 2 possible sequences AB or BA
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Eligibility Criteria

Age Range18 Years to 45 Years
SexALL
Healthy VolunteersNo
Study Sites4

Inclusion Criteria: * Age 1. Male and female participant must be 18 to 45 years of age inclusive, at the time of signing the informed consent form (ICF). Type of Participant and Disease Characteristics 2. Participants who have a documented history of physician-diagnosed asthma ≥ 12...

Countries:United States
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Frequently asked questions about HFA MDI

What is HFA MDI used for in asthma?

HFA MDI is an investigational small molecule metered-dose inhaler being developed for the treatment of asthma. It is designed to deliver medication via a hydrofluoroalkane propellant. The drug is currently in Phase 3 clinical development and has been studied in patients with well or partially controlled asthma.

What does HFA MDI target?

HFA MDI is a small molecule delivered via a metered-dose inhaler. The specific molecular target is not disclosed in the available information. The drug is being studied for its potential to induce bronchospasm compared to a next-generation propellant in patients with asthma.

Who makes HFA MDI?

HFA MDI is being developed by AstraZeneca PLC, a multinational pharmaceutical company listed on the stock exchange under the ticker symbol AZN. The company is conducting clinical trials to evaluate the safety and efficacy of this investigational inhaler for the treatment of asthma.

What phase is HFA MDI in?

HFA MDI is currently in Phase 3 clinical development. It is an investigational drug and has not yet been approved by regulatory authorities. A Phase 3 clinical trial has been completed to assess bronchospasm potentially induced by the HFA propellant in an MDI in patients with asthma.

What clinical trials is HFA MDI in?

HFA MDI has one completed Phase 3 clinical trial registered under NCT05850494. The study assessed bronchospasm potentially induced by next-generation propellant versus HFA propellant in an MDI in participants with well or partially controlled asthma. The trial enrolled 52 participants in the United States and was randomized, double-blind, and active-controlled.

Is HFA MDI the same as a next-generation propellant MDI?

HFA MDI is not the same as a next-generation propellant MDI. The clinical trial NCT05850494 compared the bronchospasm potential of HFA MDI against a next-generation propellant MDI. HFA MDI uses a hydrofluoroalkane propellant, while the comparator uses a different, next-generation propellant technology.