Single-Dose Pharmacokinetics and Safety of Oral Lofexidine in Hepatically-Impaired Subjects

Liver Failure Clinical Trial

Official title:

Single-Dose Pharmacokinetics and Safety of Oral Lofexidine in Hepatically-Impaired Subjects

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02318836
• Other study ID #: USWM-LX1-1007
• Secondary ID: 1R01DA030916
• Status: Completed
• Phase: Phase 1
• First received: July 29, 2014
• Last updated: February 22, 2018
• Start date: June 2014
• Est. completion date: October 2014

Study information

• Verified date: February 2018
• Source: US WorldMeds LLC
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This is a Phase 1, open-label, parallel-group, single-dose study of lofexidine in 6 adult subjects with mild hepatic impairment (Child Pugh score of 5 6), 6 adult subjects with moderate hepatic impairment (Child Pugh score 7 9), 6 adult subjects with severe hepatic impairment (Child Pugh score 10 15), and 6 control subjects with normal hepatic function with mean age, body mass index (BMI), and gender distribution targeted to be similar to the impaired hepatic function cohorts.

Description:

This is a Phase 1, open-label, parallel-group, single-dose study of lofexidine in 6 adult subjects with mild hepatic impairment (Child Pugh score of 5 6), 6 adult subjects with moderate hepatic impairment (Child Pugh score 7 9), 6 adult subjects with severe hepatic impairment (Child Pugh score 10 15), and 6 control subjects with normal hepatic function with mean age, body mass index (BMI), and gender distribution targeted to be similar to the impaired hepatic function cohorts. Subjects will be confined to an inpatient facility from the evening before dosing to 144 hours after dosing.

Subjects who successfully complete screening will report to the inpatient facility at an appropriate time the evening before study drug administration (Day 1) to ensure a minimum 10 hour fast. The next morning (Day 1) while still fasting, subjects will receive a single, oral dose of 400 µg lofexidine HCl (two 200 µg tablets). Blood samples will be collected for pharmacokinetic (PK) analysis at multiple time points over the next 144 hours (Day 7). Pooled urine samples will be collected at 0 3 hours, 3 6 hours, 6 12 hours, 12 24 hours, 24 48 hours, 48 96 hours, 96 120 hours and 120 144 hours post-dose. Safety will be assessed by recording adverse events (AEs), measuring vital signs (blood pressure and pulse rate) and clinical laboratory tests (chemistry, hematology, and urinalysis), recording 12 lead safety and Holter electrocardiograms (ECGs), and performing physical exams.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 24
• Est. completion date: October 2014
• Est. primary completion date: October 2014
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 65 Years

Eligibility

Inclusion Criteria:

Site will evaluate each subject for criteria in detail, which will include:

1. Between ages of 18 to 65 years at enrollment with a BMI between 19 and 38 kg/m2, inclusive.

2. Subject is eligible to enter the study if:

• Matched control subject: normal hepatic function and free from other clinically significant illnesses or disease, and medical history, physical examination, laboratory results, and other tests consistent with health, as determined by the Investigator.

• Subject with mild hepatic impairment: Child-Pugh hepatic dysfunction staging system score of 5-6 Points (Stage A) and medical history, physical examination, laboratory results, and other tests consistent with their hepatic impairment, as determined by the Investigator.

• Subject with moderate hepatic impairment: Child-Pugh hepatic dysfunction staging system score of 7 9 Points (Stage B) and medical history, physical examination, laboratory results, and other tests consistent with their hepatic impairment, as determined by the Investigator.

• Subject with severe hepatic impairment: Child-Pugh hepatic dysfunction staging system score of 10-15 Points (Stage C) and medical history, physical examination, laboratory results, and other tests consistent with their hepatic impairment, as determined by the Investigator.

Exclusion Criteria:

Site will evaluate each subject for criteria in detail, which will include:

1. The matched control subject has a history of clinically significant disease, including cardiovascular, gastrointestinal (GI), renal, hepatic, pulmonary, endocrine, hematologic, vascular, immunologic, metabolic, or collagen disease or the hepatically-impaired subject has a history of clinically significant disease including cardiovascular, GI, renal, pulmonary, endocrine, hematologic, vascular, immunologic, metabolic, or collagen disease.

2. Abnormal cardiovascular exam at Screening, including any of the following:

• clinically significant abnormal ECG (e.g., second or third degree heart block, uncontrolled arrhythmia, QTcF (Fridericia's correction) interval >450 msec for males and >470 msec for females).

• heart rate <45 bpm or symptomatic bradycardia;

• systolic blood pressure <90 mmHg or symptomatic hypotension;

• blood pressure >160/100 mmHg; or

• prior history of myocardial infarction.

3. Subjects with hepatic impairment will not be eligible to participate in the study if any of the following exclusion criteria also apply:

• Significant bleeding diathesis or esophageal bleeding within the last 8 weeks.

• Evidence of hepatic function deterioration within the last 4 weeks as indicated by liver transaminases, alkaline phosphatase, and gamma-glutamyl transpeptidase or a =50% worsening of serum bilirubin or prothrombin time.

• History of surgical portosystemic shunt.

• Prothrombin time >18 seconds.

Related Conditions & MeSH terms

• Liver Failure

Intervention

Drug:
• Lofexidine Hydrochloride (HCl) tablets
Lofexidine HCl tablets (two 200 µg tablets) will be administered orally with 240 mL room temperature tap water as a single 400 µg dose in the morning on Day 1 after a 10 hour overnight fast.

Locations

Country	Name	City	State
United States	Orlando Clinical Research Center	Orlando	Florida

Sponsors (2)

Lead Sponsor	Collaborator
US WorldMeds LLC	National Institute on Drug Abuse (NIDA)

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	PK Profile: Cmax, Tmax, AUC, ?z, CL/F, T½, CLr, CLd, Ae	Cmax, Tmax, AUC, ?z, CL/F, T½, CLr, CLd, Ae	pre dose until 144 hours post-dose
Secondary	Adverse events		screening through day 7
Secondary	Clinical laboratory tests	hematology, chemistry, urinalysis	screening through day 7
Secondary	Vital signs	blood pressure and pulse	screening through day 7
Secondary	12-lead ECG		screening through day 7
Secondary	Holter ECG		pre dose through 8 hours post dose