Assessment and Evaluation of Pharmacokinetic Profile of E004 in Healthy Adults

Phase 1

Terminated

Conditions: Asthma

Interventions: Drug: Arm T Epinephrine Inhalation Aerosol HFA, 125 mcg, 1 inhalation
Drug: Arm C-Epinephrine Inhalation Aerosol CFC

Registration Number: NCT01737892

Lead Sponsor: Amphastar Pharmaceuticals, Inc.

Brief Summary: This study examines the pharmacokinetic profile of Armstrong's proposed Epinephrine Inhalation Aerosol USP, an HFA-MDI (E004), using a stable isotope deuterium-labeled epinephrine (epinephrine-d3) to differentiate the administered drug from the endogenous epinephrine, in healthy male and female adult volunteers. The current study is designed to complement an earlier PK study, API-E004-CL-B, for a more thorough evaluation of the E004 PK. Safety of E004 will also be evaluated.

Detailed Description: This study is a randomized, evaluator-blind, single dose, two-arm, crossover, PK study, to be conducted in \~18 healthy, male and female, adult volunteers. PK will be studied using E004-d3 at 125 mcg per inhalation (Arm T). A previously marketed Epinephrine CFC-MDI, labeled "For Investigational Use Only" will be used as a Reference Control (Arm C).

The main features of the study design are:

(1) All candidates must be screened and must satisfy all enrollment criteria. All enrolled subjects will participate in two Study Visits, corresponding to two randomized treatments. Each Study Visit consists of a pre-dose baseline assessment and a post-dose evaluation for 6 hours.

(2) It is important to minimize physical and psychological disturbances to the endogenous epinephrine concentrations in the study subjects, before and during the study visits. All subjects must maintain a reclining or recumbent resting position during the entire Study Visit, with physical activities restricted to a minimum necessity for bathroom trips and study activities. Caffeine-containing (including de-caffeinated) foods or beverages are prohibited. Physical exercise, unnecessary physical activities, and video games are prohibited throughout the study visit.

(3)At the Screening Visit and the beginning of each Study Visit, each subject will be trained on the correct self-administration of MDI, using a simulation MDI unit that contains no active drug. The following two randomized treatments will be self-administered at two Study Visits:

Treatment T: Two (2) inhalations of E004-d3 (125 mcg/inhalation), totaling 250 mcg of epinephrine-d3;

Treatment C: Two (2) inhalations of Epinephrine CFC-MDI (220 mcg/inhalation, totaling 440 mcg of epinephrine base equivalent).

(4) PK blood samples will be taken from a vein in a hand or arm via an indwelling anticoagulated IV catheter, or by venipunctures, at scheduled time points of predose baseline (within 30 minutes of dosing), and at 2±1, 5±1, 7.5±1, 10±1, 12.5, 15, 20, 25, 30, 45, 60, 90, 120, 240 and 360 minutes postdose. The total volume of blood taken per subject shall not exceed 500 mL in any 30-day period. Study visit schedule may be adjusted to avoid overdrawing blood in any 30-day period.

(5) At each PK sampling point, blood samples (\~ 5mL), will be collected in ice-chilled potassium-EDTA sample tubes, each containing pre-added 1% (V:V) of a 1.0 M sodium metabisulfite solution as an antioxidant. Sample tubes will be labeled with a sample ID# (consisting of subject ID#, Study Visit#, and sample#). The sample tubes will be kept on ice or refrigerated, and will be centrifuged within 60 minutes of collection. The harvested plasma from each sample tube will be transferred to, and stored in, 2 storage tubes, respectively, and frozen at NMT -20 degrees C until analysis.

(6) PK samples will be analyzed with an established LC/MS/MS method, with a quantitative detection limit of 5 pg/mL, for both epinephrine-d3 (MW=186) and epinephrine (MW=183).

(7) Safety parameters and adverse drug events, if any, will be monitored and documented at each study visit. An End-of-Study (EOS) safety evaluation will be conducted at the end of, or within 7 days after, Study Visit-2.

Recruitment & Eligibility

Status: TERMINATED

Sex: All

Target Recruitment: 21

Inclusion Criteria

Generally healthy, male and female adults, 18-30 yrs of age at Screening
Having no clinically significant respiratory, cardiovascular and other systemic or organic illnesses, per investigator discretion;
Body weight greater than or equal to 50 kg for men and greater than or equal to 45 kg for women, and BMI within the range of 18.5 - 30.0 kg/m2 inclusive
Sitting blood pressure less than or equal to 135/90 mmHg;
Demonstrating negative alcohol/drug screen tests;
Demonstrating negative HIV, HBsAg and HCV-Ab screen tests;
Women of child-bearing potential must be non-pregnant, non-lactating, and practicing a clinically acceptable form of birth control;
Having properly consented and satisfied all other inclusion/exclusion criteria as required for this protocol.

Exclusion Criteria

A smoking history of more than or equal to 10 pack-years, or having smoked within 6 months prior to Screening;
Upper respiratory tract infections within 2 weeks, or lower respiratory tract infection within 4 weeks, prior to Screening
Any current or recent respiratory conditions that, per investigator discretion, might significantly affect pharmacodynamic response to the study drugs, including but not limited to: asthma, COPD, cystic fibrosis, bronchiectasis, tuberculosis, emphysema, etc.
Concurrent clinically significant cardiovascular, hematological, renal, neurologic, hepatic, endocrine (including diabetes), psychiatric, neoplastic or other illnesses that in the opinion of the investigator could impact on the conduct, safety and evaluation of the study
Known intolerance or hypersensitivity to any of the study MDI ingredients (i.e., epinephrine, HFA-134a, CFC-12, CFC-114, polysorbate-80, ethanol, thymol, nitric acid and ascorbic acid)
Use of prohibited drugs or failure to observe the drug washout restrictions
Having been on other investigational drug/device studies, or donated blood, in the last 30 days prior to Screening.

Study & Design

Study Type: INTERVENTIONAL

Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Arm T-Epinephrine Inhalation Aerosol HFA	Arm T Epinephrine Inhalation Aerosol HFA, 125 mcg, 1 inhalation	Experimental arm utilizing Epinephrine HFA-MDI (E004)
Arm C-Epinephrine Inhalation Aerosol CFC	Arm C-Epinephrine Inhalation Aerosol CFC	Active comparator arm utilizing Epinephrine CFC-MDI

Primary Outcome Measures

Name	Time	Method
Calculation and Comparison of relative Bioavailability of Epinephrine	up to 30 min predose and at 2, 5, 7.5, 10, 12.5, 15, 20, 25, 30, 45, 60, 90, 120, 240 and 360 minutes postdose	Blood PK samples will be collected at each visit for both study arms, then the Area Under the Curve (s) will be calculated for both arms and compared to give relative bioavailability

Secondary Outcome Measures

Name	Time	Method
Vital Signs	up to 30 min predose and at 2, 5, 7.5, 10, 12.5, 15, 20, 25, 30, 45, 60, 90, 120, 240 and 360 minutes postdose	Vital signs (SBP/DBP, blood pressure and heart rate) will be documented and summarized
12-lead ECG (Routine and QT/QTc analysis)	up to 30 min predose and at 5, 10, 15, 20, 30, 60, 120, and 360 minutes postdose	A 12-lead ECG (Routine and QT/QTc analysis) will be documented.
Physical Examinations	up to 30 min predose and after 360 min post last dose	Physical examinations will be documented at screening and end of study
Lab tests	up to 30 min predose	Lab tests, including CBC, serum comprehensive metabolic panel, urinalysis, and drug/alcohol screens for all subjects and urinary pregnancy test for women of child-bearing potential will be performed and documented