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AMPH US Equity

Amphastar Pharmaceuticals, Inc.Health Care · Pharmaceutical Preparations · CIK 1297184 · FY ends Dec 31
$21.34
+0.48 (+2.30%)
USD · as of 2026-08-18 · marketstack
21 registered studies · 0 active

Studies where AMPH is the lead sponsor, as filed with ClinicalTrials.gov. Completion dates are the sponsor's own projected windows and are revised as a study runs. Active studies first, then completed and stopped — newest readout first within each.

21 interventional · 5 with posted results

Held by 12 tracked-famous managers (MARSHALL WACE, LLP, D. E. Shaw & Co., Inc., RENAISSANCE TECHNOLOGIES LLC, TWO SIGMA INVESTMENTS, LP, AQR CAPITAL MANAGEMENT LLC, +7 more) · FINRA short interest 11.9 days to cover (settled 2026-07-31) · government filings 180d: none disclosed

StudyPhaseStatusInterventionsConditionsEnrollmentPrimary completionUpdated
Comparison of the Pharmacokinetics (PK) and Pharmacodynamics (PD) Biosimilarity of Proposed Biosimilar/Interchangeable Rapid-Acting Insulin Aspart (I004) and NovoLog® After Single-Dose Subcutaneous Administration to Healthy VolunteersNCT07560150Maximum Serum Insulin Aspart Concentration, CIAmaxRandomized · Quadruple-masked · TreatmentPhase 2/3CompletedDrug: I004, NovoLogPharmacokinetics, Pharmacodynamics, Insulin Aspart622026-06-22actual2026-07-22
Comparison of the Pharmacokinetics (PK) and Pharmacodynamics (PD) Biosimilarity of Proposed Biosimilar Rapid-Acting Insulin Aspart (I004) and NovoLog After Single-Dose Subcutaneous Administration to Healthy VolunteersNCT05539872results2026-03-05Maximum Serum Insulin Aspart Concentration, CIAmaxRandomized · Quadruple-masked · TreatmentStudy Protocol · Statistical Analysis PlanPhase 2/3CompletedDrug: I004, NovoLogPharmacokinetics, Pharmacodynamics692023-01-29actual2026-03-05
Study of Drug Exposure in Systemic Circulation of Primatene Mist by Oral Inhalation, Versus Epinephrine Injection by Intramuscular Injection and ProAir by Oral Inhalation in Healthy IndividualsNCT04207840results2021-03-30C[Max], Maximum Plasma Concentration of Albuterol or EpinephrineRandomized · Single-masked · TreatmentStudy Protocol · Statistical Analysis PlanPhase 4CompletedCombination product: Epinephrine (0.125 mg/inhalation), Epinephrine Injection Auto-Injector (0.3mg/0.3mL), Albuterol Sulfate (0.09 mg/inhalation)Pharmacokinetics, Epinephrine, Albuterol, Asthma, Anaphylaxis282019-12-20actual2021-03-30
Evaluation of Pharmacokinetics and Safety of A006 in Healthy VolunteersNCT02271334Area Under the Curve of Drug Concentration versus Time (AUC[0-t])Randomized · Quadruple-masked · TreatmentPhase 2CompletedDrug: A006 DPI, A006 DPI, Proventil® MDI, Proventil® MDIAsthma22Oct 2014actual2017-04-19
Albuterol DPI (A006) Clinical Study-B3:Efficacy, Dose-ranging and Safety EvaluationNCT02210806Area Under the Curve (AUC[0-6h]) of Post-Dose FEV1 Percentage Change (∆%FEV1) from the Same-Day Pre-Dose BaselineRandomized · Quadruple-masked · TreatmentPhase 2CompletedDrug: A006 DPI, A006 DPI, Proventil® MDI, Proventil® MDI · Other: Placebo DPIAsthma22Sep 2014actual2017-04-19
Evaluation of Efficacy and Safety for Single Dose of E004 in Children With AsthmaNCT01737905Bronchodilator effectRandomized · Quadruple-masked · TreatmentPhase 3CompletedDrug: Epinephrine HFA-MDI (E004), Placebo-HFAAsthma28Mar 2013actual2016-03-11
Evaluation of the Allergenicity of AMPHADASE INJECTION (Hyaluronidase Injection USP)NCT01689363results2017-01-20Positive Allergic Reaction to Amphadase® in the Per-Protocol Population (PPP)Randomized · Triple-masked · ScreeningPhase 2CompletedDrug: Hyaluronidase, Histamine, SalineAllergic Skin Reaction253Nov 2012actual2017-01-20
Assessment and Evaluation of Pharmacokinetic Profile of E004 in Healthy AdultsNCT01737892Calculation and Comparison of relative Bioavailability of EpinephrineRandomized · Single-masked · TreatmentPhase 1/2Terminatedsponsor's stated reason: unable to validate analytical methodDrug: Arm T Epinephrine Inhalation Aerosol HFA, 125 mcg, 1 inhalation, Arm C-Epinephrine Inhalation Aerosol CFCAsthma21Nov 2012actual2016-03-17
Albuterol DPI (A006) Clinical Study-B2: Efficacy, Dose-Ranging and Initial Safety EvaluationNCT01581177Change in FEV1 Area Under the Curve (AUC) versus placeboRandomized · Triple-masked · TreatmentPhase 2CompletedDrug: Albuterol DPI 25 mcg/inh, Albuterol DPI 90 mcg/inh, Placebo DPI, Albuterol MDI 90 mcg/inhAsthma23Jul 2012actual2017-05-19
Safety Study in Adolescent and Adult Patients With AsthmaNCT01476904Adverse EventsRandomized · Triple-masked · TreatmentPhase 3CompletedDrug: Placebo, Primatene Mist, Epinephrine inhalationAsthma208Apr 2012actual2017-02-13
Evaluation of Efficacy and Safety of E004 in Children With AsthmaNCT01460511Primary Efficacy Endpoint AUC of FEV1's relative changeRandomized · Quadruple-masked · TreatmentPhase 3CompletedDrug: E004 (Epinephrine Inhalation Aerosol) HFA-MDI, Placebo-HFAAsthma70Mar 2012actual2018-07-31
Epinephrine Inhalation Aerosol USP: For Evaluation Of Efficacy And Safety In Asthma PatientsNCT01357642Change in Area Under the Curve (AUC) versus placeboRandomized · Triple-masked · TreatmentPhase 3CompletedDrug: Epinephrine inhalation aerosol, Placebo, epinephrine inhalation aerosolAsthma373Nov 2011actual2016-03-11
Epinephrine Inhalation Aerosol USP, CLINICAL STUDY-B3 FOR ASSESSMENT OF PHARMACOKINETICSNCT01255709Pharmacokinetics including maximum concentration and area under the curveRandomized · Triple-masked · TreatmentPhase 2CompletedDrug: Arm T1: Primatene Mist HFA, Arm T2: Primatene Mist HFA, Arm C: Primatene Mist (epinephrine inhalation aerosol, USP)Asthma24Jan 2011actual2016-03-17
Escalating and Cumulative-Dose Study of Pharmacokinetics (PK), Pharmacodynamics (PD) and Safety of A006NCT01189396Bronchodilatory efficacy after the escalating and cumulative-doses, up to 1,440 mcg.Randomized · Triple-masked · TreatmentPhase 2CompletedDrug: A006, Placebo DPI, Proventil-HFAAsthma, Bronchospasm, Chronic Obstructive Pulmonary Disease (COPD)27Dec 2010actual2017-07-02
Dose-Ranging Study of A006 DPI, in Adult Asthma PatientsNCT01174732AUCRandomized · Triple-masked · TreatmentPhase 2CompletedDrug: albuterol inhalation powder, albuterol inhalation powder, albuterol inhalation powder, albuterol inhalation powder, Placebo, albuterol inhalation aerosol, albuterol inhalation aerosolAsthma, Bronchospasm26Oct 2010actual2017-04-19
Epinephrine Inhalation Aerosol USP, a HFA-MDI Study for Assessment of PharmacokineticsNCT01188577results2014-10-24Baseline Concentration (C0) of Total EpinephrineRandomized · Triple-masked · TreatmentPhase 1/2CompletedDrug: Epinephrine Inhalation Aerosol, HFA, Epinephrine Inhalation AerosolAsthma, Bronchospasm, Wheezing, Shortness of Breath23Sep 2010actual2017-07-25
Pharmacokinetics (PK) Study of Epinephrine Inhalation Aerosol in Healthy VolunteersNCT01143051results2014-07-15Baseline Concentration (C0) of Labeled Epinephrine Total EpinephrineRandomized · Triple-masked · TreatmentPhase 1/2CompletedDrug: epinephrine inhalation aerosol, epinephrine inhalation aerosol, epinephrine inhalation aerosolAsthma24Jun 2010actual2018-09-25
Randomized, Placebo/Active Crossover Dose-ranging Study for Safety and Efficacy in Asthma Patients.NCT01025648The AUC of post-dose FEV1 percentage changes (Δ%) from the Pre-dose baseline. The primary analysis of the primary endpoint is the difference of Δ% FEV1, compared between the E004 treatment arms (T1, T2, T3 and T4) and the Placebo control (Arm P).Randomized · Triple-masked · TreatmentPhase 1/2Terminatedsponsor's stated reason: Optimization of protocolDrug: E004 (epinephrine inhalation aerosol), 90 mcg/actuation, E004 Placebo, E004 (epinephrine inhalation aerosol), 125 mcg, E004 (epinephrine inhalation aerosol), 220 mcg, epinephrine inhalation aerosol, CFC propelled, E004 (epinephrine inhalation aerosol), 160 mcgAsthma9Dec 2009actual2018-05-16
4-Week Study of Efficacy, Safety and PK of Albuterol-HFA Versus Proventil-HFA in Pediatric AsthmaNCT00634517The primary endpoint for efficacy evaluation is to obtain the ratio of the geometric mean of area under the curve of change in FEV1%versus time for pediatric patients using the study drug to the active reference drug.Randomized · Quadruple-masked · TreatmentPhase 3Terminatedsponsor's stated reason: IND voluntarily withdrawn, without prejudiceDrug: Armstrong Albuterol Sulfate Inhalation Aerosol, Albuterol Sulfate Inhalation AerosolAsthma48Dec 2008actual2013-07-15
Single-Dose Cross-Over Study of the Effects of Albuterol-HFA in Exercise Induced BronchoconstrictionNCT00634829The maximum percentage fall in FEV1, from the Pre-Exercise FEV1, between Albuterol-HFA and Placebo-HFA.Randomized · Quadruple-masked · PreventionPhase 3Terminatedsponsor's stated reason: IND voluntarily withdrawn, without prejudiceDrug: albuterol (Armstrong Albuterol HFA), Albuterol Sulfate (Provenetil-HFA), Placebo-HFAAsthma, Bronchospasm24Oct 2008actual2013-07-15
Controlled, 12-Week Study of Albuterol HFA Versus the Active Control, Proventil(R)-HFA in Asthmatic PatientsNCT00635505The primary endpoint is the bronchodilator effect expressed as the mean area under the curve (AUC) of FEV1 (% change from Same-Day Baseline FEV1) versus time.Randomized · Quadruple-masked · TreatmentPhase 3Terminatedsponsor's stated reason: IND voluntarily withdrawn, without prejudiceDrug: albuterol HFA (Armstrong's), albuterol HFA (Proventil HFA), HFA placeboAsthma300Aug 2008actual2013-07-15

Primary completion is the date the sponsor filed with the registry — their own projection, revised whenever they revise it, unless the row is marked actual.

Source: ClinicalTrials.gov, retrieved 2026-08-19