Alexza Pharmaceuticals

Closed portfolio with an early-phase archive tilt

According to ClinicalTrials.gov-derived indexes, Alexza Pharmaceuticals sits in the top decile of US sponsors by registered trial count (#696 of 15,742 sponsors by registered trial count).

22 total trials none currently recruiting 21 completed early-phase tilt top decile by trial count

Alexza Pharmaceuticals: 22 sponsored US clinical trials, none currently recruiting.

Alexza Pharmaceuticals sponsors 22 registered US clinical trials on ClinicalTrials.gov, none currently recruiting, and 21 completed. 3 of these trials are in Phase 3-4 (later-stage) and 19 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Thorough QT/QTc Study, with 1 trials.

Top-decile sponsor footprint

Alexza Pharmaceuticals ranks in the top decile of sponsors by registered trial count (#696 of 15,742 sponsors by registered trial count). Volume at this scale usually reflects a long institutional pipeline, read phase tilt and therapeutic areas below before treating it as current-year activity.

Trial completion reliability score

C 78/100

21 of 22 decided trials (Completed vs. Terminated on ClinicalTrials.gov) reached their planned completion (95.5%), vs. national p10 68.4% / p90 100% among 1,234 sponsors with at least 10 decided trials. Still-open trials (Recruiting, Active-not-recruiting, Not-yet-recruiting) are excluded since they have not reached an outcome yet.

Indexed trials (enrollment closed)

22 total, page 1 of 1

TERMINATED Phase 2

Study to Evaluate the Efficacy and Safety of Staccato Apomorphine (AZ-009) in Patients With Parkinson's Disease Experiencing OFF Episodes

NCT05979415

COMPLETED Phase 2

Staccato Granisetron® (AZ 010) for the Treatment of Cyclic Vomiting Syndrome

NCT04645953

COMPLETED Phase 1

Staccato® Granisetron Multiple Dose PK

NCT04327765

COMPLETED Phase 4

ADASUVE-Lorazepam Drug-Drug Interaction

NCT01877642

COMPLETED Phase 1

Staccato Loxapine Pulmonary Safety in Patients With COPD

NCT00889837

COMPLETED Phase 1

Staccato Loxapine Pulmonary Safety in Patients With Asthma

NCT00890175

COMPLETED Phase 1

Staccato Loxapine Thorough QT/QTc Study

NCT00874237

COMPLETED Phase 1

Staccato Loxapine PK in Smokers and Nonsmokers

NCT00873769

COMPLETED Phase 2

Staccato Loxapine in Migraine (Out Patient)

NCT00825500

COMPLETED Phase 1

Staccato Loxapine Pulmonary Safety in Healthy Volunteers

NCT00789360

COMPLETED Phase 3

Staccato Loxapine in Agitated Patients With Bipolar Disorder

NCT00721955

COMPLETED Phase 3

Staccato Loxapine in Agitated Patients With Schizophrenia

NCT00628589

COMPLETED Phase 1

Staccato Zaleplon Single Dose Pharmacokinetics

NCT00620620

COMPLETED Phase 1

Staccato Loxapine Multidose PK

NCT00555412

COMPLETED Phase 1

Staccato Prochlorperazine Thorough QT/QTc

NCT00543062

COMPLETED Phase 2

Staccato Loxapine in Migraine (in Clinic)

NCT00489476

COMPLETED Phase 2

Staccato Alprazolam in Panic Attack

NCT00477451

COMPLETED Phase 2

Staccato Loxapine in Agitation (Proof of Concept)

NCT00369577

COMPLETED Phase 2

Staccato Prochlorperazine in Migraine (Out Patient)

NCT00422812

COMPLETED Phase 1

Staccato Fentanyl Single and Multidose PK

NCT00402350

COMPLETED Phase 1

Staccato Loxapine Single Dose PK

NCT00444028

COMPLETED Phase 2

Staccato Prochlorperazine in Migraine (in Clinic)

NCT00610428

Phase Distribution

PhaseTrial count
Phase 1 11
Phase 2 8
Phase 3 2
Phase 4 1

Therapeutic Areas

How the Alexza Pharmaceuticals early-phase archive is shaped

22 indexed studies, none listed as recruiting (0% open); 21 completed (95%).

Phase mix: 3 late (III/IV) vs 19 early (I/II) (early-phase heavy).

Top condition: Thorough QT/QTc Study (1 trial), 1 other listed.

How to read a closed sponsor archive

When recruiting_count is zero, the indexed set is completed or otherwise not open. Phase tilt still describes where archived studies sat on the investigational pathway. Re-check ClinicalTrials.gov before acting.

Alexza Pharmaceuticals: archived-pipeline peers nationwide

Peers matched on 22 indexed studies with no current recruiting: volume and archive shape, not condition overlap.

Alexza Pharmaceuticals sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot). 2×2 strategic matrix plotting 9 entities by Total trials (X) and Recruiting share (Y), with a crosshair dividing the plot into four quadrants. Higher volume & more openFocused & more openHigher volume, mostly closedSmaller & mostly closed 0510152025 0%5%10%15% Total trials Recruiting share Alexza PharmaceuticalsAlaunos TherapeuticsCalithera BiosciencesFate TherapeuticsGriffin Hospital10xBio22nd Century Group23andMe3-C Institute for Social Development
Alexza Pharmaceuticals sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot).

Alexza Pharmaceuticals sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together.

Sponsors near 22 archived trials

Sponsors with similar archive density (± trial count)

What to do with this Alexza Pharmaceuticals page

22 registered trials is a research-attention snapshot, not an endorsement of Alexza Pharmaceuticals or any single study.

  • None of Alexza Pharmaceuticals's trials are currently recruiting in this registry; that can change as new trials post, or check the broader research index. Browse research indexes
  • Thorough QT/QTc Study is the condition Alexza Pharmaceuticals studies most, compare against other sponsors active in the same condition before evaluating a specific study. See Thorough QT/QTc Study trials
  • Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide

Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.

Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. Alexza Pharmaceuticals pipeline card: 22 registered trials from official public datasets. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.