The study will assess the bioequivalence between single doses of GXR manufactured in Merck Nantong China (test drug) and GXR manufactured in Merck Darmstadt Germany (reference drug) under fed and fasted state in healthy participants.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
NONE
Enrollment
54
Participants received a single oral dose of 500 mg of test GXR tablet (Merck Nantong/China) under fasting or fed conditions on either Day 1 (Treatment Period 1) or Day 8 (Treatment Period 2).
Participants received a single oral dose of 500 mg of reference GXR tablet (Merck Darmstadt/France) under fasting or fed conditions on either Day 1 (Treatment Period 1) or Day 8 (Treatment Period 2).
Xuanwu Hospital Capital Medical University
Beijing, China
Area Under the Plasma Concentration-Time Curve From Time Zero to the Last Sampling Time (AUC 0-t) of Metformin
Area under the plasma concentration versus time curve from time zero to the last sampling time t at which the concentration was at or above the lower limit of quantification (LLQ). AUC0-t was to be calculated according to the mixed log-linear trapezoidal rule.
Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14 post-dose on Day 1 and Day 8; 24, 30, 36 hours post-dose on Day 2 and 9; 48 hours post-dose on Day 3 and 10
Maximum Observed Plasma Concentration (Cmax) of Metformin
Pharmacokinetic (PK) parameter Cmax was obtained directly from the concentration versus time curve.
Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14 post-dose on Day 1 and Day 8; 24, 30, 36 hours post-dose on Day 2 and 9; 48 hours post-dose on Day 3 and 10
Time to Reach Maximum Plasma Concentration of Metformin
Time to reach the maximum plasma concentration (Tmax) was obtained directly from the concentration versus time curve.
Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14 post-dose on Day 1 and Day 8; 24, 30, 36 hours post-dose on Day 2 and 9; 48 hours post-dose on Day 3 and 10
Apparent Terminal Half-Life (t1/2) of Metformin
Terminal half-life is the time measured for the concentration to decrease by one half. Terminal half-life calculated by natural log 2 divided by lambda z.
Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14 post-dose on Day 1 and Day 8; 24, 30, 36 hours post-dose on Day 2 and 9; 48 hours post-dose on Day 3 and 10
Area Under the Plasma Concentration-Time Curve From Time 0 to Infinity (AUC0-inf) of Metformin
AUC0-inf was calculated by combining AUC0-t and AUCextra. AUC extra represents an extrapolated value obtained by Clast/ lambda z, where Clast is the calculated plasma concentration at the last sampling time point at which the measured plasma concentration is at or above the Lower Limit of quantification (LLQ) and lambda z is the apparent terminal rate constant determined by log-linear regression analysis of the measured plasma concentrations of the terminal log-linear phase.
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Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14 post-dose on Day 1 and Day 8; 24, 30, 36 hours post-dose on Day 2 and 9; 48 hours post-dose on Day 3 and 10
Area Under the Plasma Concentration-Time Curve From Time Tlast Extrapolated to Infinity (AUCextra) of Metformin
AUCextra% was defined as area under the curve from time tlast extrapolated to infinity as percentage of AUC 0-infinity. Here, tlast is the last sampling time at which the concentration is at or above the lower limit of quantification.
Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14 post-dose on Day 1 and Day 8; 24, 30, 36 hours post-dose on Day 2 and 9; 48 hours post-dose on Day 3 and 10
Elimination Rate Constant (Lambda z) of Metformin
Lambda z was determined from the terminal slope of the log-transformed plasma concentration curve using linear regression method.
Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14 post-dose on Day 1 and Day 8; 24, 30, 36 hours post-dose on Day 2 and 9; 48 hours post-dose on Day 3 and 10
Total Body Clearance (CL/f) of Metformin
Clearance of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes.
Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14 post-dose on Day 1 and Day 8; 24, 30, 36 hours post-dose on Day 2 and 9; 48 hours post-dose on Day 3 and 10
Apparent Volume of Distribution at After Extravascular Administration (Vz/f) of Metformin
Vz/f is defined as the distribution of a study drug between plasma and the rest of the body after oral dosing.
Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14 post-dose on Day 1 and Day 8; 24, 30, 36 hours post-dose on Day 2 and 9; 48 hours post-dose on Day 3 and 10
Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Serious TEAEs
An Adverse event (AE) was defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease associated with the use of study drug, whether or not considered related to the study drug or worsening of pre-existing medical condition, whether or not related to study drug. A serious adverse event (SAE) was an AE that resulted in any of the following outcomes: death; life threatening; persistent/significant disability/incapacity; initial or prolonged inpatient hospitalization; congenital anomaly/birth defect or was otherwise considered medically important. An AE was considered as 'treatment emergent' if it occurred after the first drug administration of each period or if it was present prior to drug administration but exacerbated after the drug administration. TEAEs included both Serious TEAEs and non-serious TEAEs.
Time frame: Time from informed consent up to end of study (Day 15)
Number of Participants With Clinically Significant Abnormalities in Vital Signs
Vital sign assessment included blood pressure, pulse rate, body temperature and respiration (frequency per minute). Number of participants with clinically significant abnormalities in vital signs were reported. Clinically significance was decided by investigator.
Time frame: Time from informed consent up to end of study (Day 15)
Number of Participants With Clinically Significant Abnormalities in Laboratory Values
The laboratory measurements included hematology, blood chemistry and urinalysis. Number of participants with clinically significant abnormalities in laboratory values were reported. Clinically Significance was decided by investigator.
Time frame: Time from informed consent up to end of study (Day 15)
Number of Participants With Clinically Significant Abnormalities in Physical Examination Findings
Physical examination included assessments of the general appearance, skin and mucosa, superficial lymph nodes, head and neck, chest, abdomen, musculoskeletal, and neurological systems. Number of participants with clinically significant abnormalities in physical examination findings were reported. clinically significance was decided by investigator.
Time frame: Time from informed consent up to end of study (Day 15)
Number of Participants With Clinically Significant Abnormalities in 12-lead Electrocardiogram (ECG) Findings
The 12-lead ECG recordings were obtained after 5 minutes of rest in a semi-supine position. ECG recordings included rhythm, ventricular rate, PR interval, QRS duration, QT and QTc intervals. Number of participants with clinically significant abnormalities in 12-lead ECG findings were reported. Clinically significance was decided by investigator.
Time frame: Time from informed consent up to end of study (Day 15)