Healthy
Conditions
Keywords
Eutirox, Levothyroxine
Brief summary
The study investigated the bioequivalence between the new and the approved formulation for levothyroxine.
Interventions
DRUGReference Eutirox®
Participants received single oral dose of Reference Eutirox® 600 microgram (3 tablets of 200 microgram) either in treatment period 1 or 2.
DRUGTest Eutirox®
Participants received single oral dose of Test Eutirox® 600 microgram (3 tablets of 200 microgram) either in treatment 1 or 2.
Sponsors
Merck Healthcare KGaA, Darmstadt, Germany, an affiliate of Merck KGaA, Darmstadt, Germany
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
OTHER
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 55 Years
Healthy volunteers
Yes
Inclusion criteria
* Participants who have provided their written consent prior to any study-related activity * Ethnic origin: Mexicans * Body mass index from 18 to 27 kilogram per meter square (kg/m\^2) * Normal vital signs (includes heart rate between 50 and 100 beats per minute, respiratory rate between 12 and 20 per minute, systolic blood pressure between 80 and 129 milimeter of mercury (mmHg) , diastolic blood pressure between 50 and 80 mmHg and temperature between 36.0 degree celsius and 37.0 degree celsius. The measurement will be made according to the instructive BE-IT-005 Medición de signos vitales) * Normal electrocardiogram \[ECG\]. No abnormalities are allowed, even though they are not relevant (PR, QRS, QT, QTcF should be within normal range; no conduction abnormalities are allowed, etcetera (etc) * All values in blood and urine tests should be within the normal range or showing no clinically relevant deviation as judged by the Investigator * Participants with thyroid panel results within normal range (T3 and T4 total and free, as well as thyroid-stimulating hormone (TSH) should be within the normal range) * Non-smoker at least in the last 3 months * Other protocol defined inclusion criteria could apply
Exclusion criteria
* Participation in the clinical study within 90 days prior to the first dose of the study drug * History of hypersensitivity to the study drug or its excipients * History or current asthma or any severe allergy (which requires hospitalization or prolonged therapy), allergy or intolerance to any food that, in the opinion of the investigator, poses a safety risk (allergy to iodine) * History of cardiovascular, renal, liver, metabolic, gastrointestinal, neurological, endocrine, hematopoietic (any type of anemia) conditions, mental disorder or organic abnormalities that may affect the pharmacokinetic study of the study drug * Any medical or surgical condition, including findings in the medical history or clinical assessment prior to the study, that in the opinion of the investigator poses a risk or contraindication for the participants participation in the study and may affect the study objectives, conduct or analysis * History or presence of alcohol abuse (average daily intake not higher than 3 units or weekly intake not higher than 21 units; 1 unit is equivalent to 340 mililiter (mL) of beer, 115 mL of wine or 43 mL of prepared drinks), psychoactive substances or chronic use of drugs * Participants who have been exposed to agents knows by inducing or inhibiting the liver enzymatic systems or who have taken potentially toxic drugs within the last 30 days to the study start-up * Participants who take drugs affecting the metabolism of the thyroid hormone, such as: oral contraceptives, hormonal implants, parenteral hormones, steroids, anabolic drugs, androgens, etc., or any drug affecting the levothyroxine's bioavailability such as the proton pump inhibitors or multivitamins, nutritional supplements or herbal products that may affect the study, except for the occasional use of paracetamol * Participants who have been hospitalized for any reason within the 60 days prior to the study start-up or who have been severely ill within the last 30 days prior to the study start-up * Participants who have donated or lost 450 mL of blood within the last 60 days prior to the study start-up * Participants non- smokers, who have smoked tobacco, cigarettes or consumed coffee, snuff or drinks containing xanthines such as caffeine, (tea, cocoa, chocolate, matte, cola, etc.) theobromine, theophylline, among others, affecting the pharmacokinetics of the drug in assessment, drinking alcohol, or charcoal-grilled foods consumed within twenty-four hours prior to administration the dose of medication * Screening biosafety positive tests for the human immunodeficiency virus (HIV), hepatitis B virus (HBV), hepatitis C virus (HCV) and syphilis Venereal Disease Research Laboratory (VDRL) * Positive result in the abuse drugs screening tests, such as: amphetamines, benzodiazepines, cocaine, methamphetamines, morphine and tetrahydrocannabinoids * Presence of alcohol in breath test * Women pregnancy positive tests (qualitative and quantitative) at the screening and inclusion in each period * Other protocol defined
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Maximum Serum Concentration in Pre Dose Corrected Data (Cmax[aj]) of Levothyroxine (T4) | Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose | Cmax was obtained from the concentration time curve. Cmax\[aj\] was the maximum serum concentration in pre dose corrected data where pre dose corrected data was obtained by subtracting pre dose level of Levothyroxine (T4) from level of Levothyroxine (T4) after administration. |
| Area Under Serum Concentration-Time Curve From Time Zero to The Last Sampling Time in Pre Dose Corrected Data (AUC0-t [aj]) of Levothyroxine (T4) | Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose | AUC0-t was defined as area under the curve of the serum concentration as a function of time, from time 0 until the last sampling time by means of the trapezoidal rule. AUC0-t \[aj\] was the area under the serum concentration-time curve from time zero to the last sampling time in pre dose corrected data where pre dose corrected data was obtained by subtracting pre dose level of Levothyroxine (T4) from level of Levothyroxine (T4) after administration. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Area Under The Curve of the Serum Concentration as a Function of Time, From Time Zero to The Last Sampling Time (AUC0-t) of Levothyroxine (T4) | Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose | Area under the serum 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 (LLOQ). |
| Maximum Serum Concentration (Cmax) of Levothyroxine (T4) | Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose | Cmax was obtained directly from the concentration versus time curve. |
| Number of Participants With Clinically Significant Abnormalities in Physical Examination | Baseline up to Day 37 | 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. Investigator decided clinical significance. |
| Time to Reach Maximum Serum Concentration (Tmax) of Levothyroxine (T4) | Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose | Tmax was obtained directly from serum concentration-time curve. |
| Number of Participants With Clinically Significant Abnormalities in Laboratory Parameters | Baseline up to Day 37 | The laboratory measurements included hematology, blood chemistry and urinalysis. Number of participants with clinically significant abnormalities in laboratory parameters were reported. Investigator decided clinical significance. |
| Number of Participants With Clinically Significant Abnormalities in Electrocardiogram (ECG) | Baseline up to Day 37 | The 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 ECG were reported. Investigator decided clinical significance. |
| Number of Participants With Adverse Events (AEs) | Baseline up to Day 51 | 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. Number of participants with adverse events were reported. |
| Number of Participants With Clinically Significant Abnormalities in Vital Signs | Baseline up to Day 37 | Vital sign assessment included blood pressure, pulse rate, body temperature and respiration. Number of participants with clinically significant abnormalities in vital signs were reported. Investigator decided clinical significance. |
| Elimination Half-Life (t1/2) of Levothyroxine (T4) | Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose | t1/2 was the time measured for the concentration to decrease by one half. Terminal half-life calculated by natural log 2 divided by elimination constant. |
Countries
Mexico
Participant flow
Participants by arm
| Arm | Count |
|---|---|
| All Participants All participants who received a single oral dose of Reference Eutirox® 600 mcg (200\*3 mcg) or a single oral dose of test Eutirox® 600 mcg (200\*3 mcg) in either Treatment Period 1 or 2. | 44 |
| Total | 44 |
Withdrawals & dropouts
| Period | Reason | FG000 | FG001 |
|---|---|---|---|
| Treatment Period 2 | Withdrawal by Subject | 0 | 1 |
Baseline characteristics
| Characteristic | All Participants | — |
|---|---|---|
| Age, Continuous | 25.93 years STANDARD_DEVIATION 5.93 | — |
| Race and Ethnicity Not Collected | — | — Participants |
| Sex: Female, Male Female | 8 Participants | — |
| Sex: Female, Male Male | 36 Participants | — |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk |
|---|---|---|
| deaths Total, all-cause mortality | 0 / 44 | 0 / 44 |
| other Total, other adverse events | 0 / 44 | 4 / 44 |
| serious Total, serious adverse events | 0 / 44 | 0 / 44 |
Outcome results
Primary
Area Under Serum Concentration-Time Curve From Time Zero to The Last Sampling Time in Pre Dose Corrected Data (AUC0-t [aj]) of Levothyroxine (T4)
AUC0-t was defined as area under the curve of the serum concentration as a function of time, from time 0 until the last sampling time by means of the trapezoidal rule. AUC0-t \[aj\] was the area under the serum concentration-time curve from time zero to the last sampling time in pre dose corrected data where pre dose corrected data was obtained by subtracting pre dose level of Levothyroxine (T4) from level of Levothyroxine (T4) after administration.
Time frame: Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose
Population: PK analysis set included all randomized participants who received study medication in both treatment periods. Here, Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Refernece Eutirox® | Area Under Serum Concentration-Time Curve From Time Zero to The Last Sampling Time in Pre Dose Corrected Data (AUC0-t [aj]) of Levothyroxine (T4) | 1738.65 nanogram*hour per milliliter (ng*hr/mL) | Standard Deviation 438.93 |
| Test Eutirox® | Area Under Serum Concentration-Time Curve From Time Zero to The Last Sampling Time in Pre Dose Corrected Data (AUC0-t [aj]) of Levothyroxine (T4) | 1693.89 nanogram*hour per milliliter (ng*hr/mL) | Standard Deviation 389.5 |
90% CI: [91.34, 104.26]
Primary
Maximum Serum Concentration in Pre Dose Corrected Data (Cmax[aj]) of Levothyroxine (T4)
Cmax was obtained from the concentration time curve. Cmax\[aj\] was the maximum serum concentration in pre dose corrected data where pre dose corrected data was obtained by subtracting pre dose level of Levothyroxine (T4) from level of Levothyroxine (T4) after administration.
Time frame: Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose
Population: Pharmacokinetic (PK) analysis set included all randomized participants who received study medication in both treatment periods. Here, Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Refernece Eutirox® | Maximum Serum Concentration in Pre Dose Corrected Data (Cmax[aj]) of Levothyroxine (T4) | 67.24 nanogram per milliliter (ng/mL) | Standard Deviation 15.77 |
| Test Eutirox® | Maximum Serum Concentration in Pre Dose Corrected Data (Cmax[aj]) of Levothyroxine (T4) | 66.44 nanogram per milliliter (ng/mL) | Standard Deviation 15.77 |
90% CI: [94.55, 102.68]
Secondary
Area Under The Curve of the Serum Concentration as a Function of Time, From Time Zero to The Last Sampling Time (AUC0-t) of Levothyroxine (T4)
Area under the serum 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 (LLOQ).
Time frame: Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose
Population: PK analysis set included all randomized participants who received study medication in both treatment periods.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Refernece Eutirox® | Area Under The Curve of the Serum Concentration as a Function of Time, From Time Zero to The Last Sampling Time (AUC0-t) of Levothyroxine (T4) | 5229.98 ng*hour/mL | Standard Deviation 562.73 |
| Test Eutirox® | Area Under The Curve of the Serum Concentration as a Function of Time, From Time Zero to The Last Sampling Time (AUC0-t) of Levothyroxine (T4) | 5218.87 ng*hour/mL | Standard Deviation 587.42 |
90% CI: [98.45, 101.03]
Secondary
Elimination Half-Life (t1/2) of Levothyroxine (T4)
t1/2 was the time measured for the concentration to decrease by one half. Terminal half-life calculated by natural log 2 divided by elimination constant.
Time frame: Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose
Population: PK analysis set included all randomized participants who received study medication in both treatment periods.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Refernece Eutirox® | Elimination Half-Life (t1/2) of Levothyroxine (T4) | 186.40 hour | Standard Deviation 96.26 |
| Test Eutirox® | Elimination Half-Life (t1/2) of Levothyroxine (T4) | 189.10 hour | Standard Deviation 102.07 |
Secondary
Maximum Serum Concentration (Cmax) of Levothyroxine (T4)
Cmax was obtained directly from the concentration versus time curve.
Time frame: Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose
Population: PK analysis set included all randomized participants who received study medication in both treatment periods.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Refernece Eutirox® | Maximum Serum Concentration (Cmax) of Levothyroxine (T4) | 139.80 ng/mL | Standard Deviation 16.16 |
| Test Eutirox® | Maximum Serum Concentration (Cmax) of Levothyroxine (T4) | 139.17 ng/mL | Standard Deviation 19.24 |
90% CI: [97.7, 100.85]
Secondary
Number of Participants With Adverse Events (AEs)
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. Number of participants with adverse events were reported.
Time frame: Baseline up to Day 51
Population: Safety analysis set included all randomized participants who received at least one dose of study medication.
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| Refernece Eutirox® | Number of Participants With Adverse Events (AEs) | 0 Participants |
| Test Eutirox® | Number of Participants With Adverse Events (AEs) | 4 Participants |
Secondary
Number of Participants With Clinically Significant Abnormalities in Electrocardiogram (ECG)
The 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 ECG were reported. Investigator decided clinical significance.
Time frame: Baseline up to Day 37
Population: Safety analysis set included all randomized participants who received at least one dose of study medication.
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| Refernece Eutirox® | Number of Participants With Clinically Significant Abnormalities in Electrocardiogram (ECG) | 0 Participants |
| Test Eutirox® | Number of Participants With Clinically Significant Abnormalities in Electrocardiogram (ECG) | 0 Participants |
Secondary
Number of Participants With Clinically Significant Abnormalities in Laboratory Parameters
The laboratory measurements included hematology, blood chemistry and urinalysis. Number of participants with clinically significant abnormalities in laboratory parameters were reported. Investigator decided clinical significance.
Time frame: Baseline up to Day 37
Population: Safety analysis set included all randomized participants who received at least one dose of study medication.
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| Refernece Eutirox® | Number of Participants With Clinically Significant Abnormalities in Laboratory Parameters | 0 Participants |
| Test Eutirox® | Number of Participants With Clinically Significant Abnormalities in Laboratory Parameters | 2 Participants |
Secondary
Number of Participants With Clinically Significant Abnormalities in Physical Examination
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. Investigator decided clinical significance.
Time frame: Baseline up to Day 37
Population: Safety analysis set included all randomized participants who received at least one dose of study medication.
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| Refernece Eutirox® | Number of Participants With Clinically Significant Abnormalities in Physical Examination | 0 Participants |
| Test Eutirox® | Number of Participants With Clinically Significant Abnormalities in Physical Examination | 0 Participants |
Secondary
Number of Participants With Clinically Significant Abnormalities in Vital Signs
Vital sign assessment included blood pressure, pulse rate, body temperature and respiration. Number of participants with clinically significant abnormalities in vital signs were reported. Investigator decided clinical significance.
Time frame: Baseline up to Day 37
Population: Safety analysis set included all randomized participants who received at least one dose of study medication.
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| Refernece Eutirox® | Number of Participants With Clinically Significant Abnormalities in Vital Signs | 0 Participants |
| Test Eutirox® | Number of Participants With Clinically Significant Abnormalities in Vital Signs | 0 Participants |
Secondary
Time to Reach Maximum Serum Concentration (Tmax) of Levothyroxine (T4)
Tmax was obtained directly from serum concentration-time curve.
Time frame: Pre-dose, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.5, 6.0, 6.5, 8.0, 10.0, 12.0, 24.0, 36.0 and 48.0 hours post-dose
Population: PK analysis set included all randomized participants who received study medication in both treatment periods.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Refernece Eutirox® | Time to Reach Maximum Serum Concentration (Tmax) of Levothyroxine (T4) | 3.52 hour | Standard Deviation 1.19 |
| Test Eutirox® | Time to Reach Maximum Serum Concentration (Tmax) of Levothyroxine (T4) | 3.50 hour | Standard Deviation 1.14 |