Single-Dose Open-label Randomized Crossover, in Two Periods and in Two Sequences, Single-Center Comparative Bioequivalence Study of Two Formulations Lamotrigine, 100 mg Tablets (Pharmtechnology LLC, Republic of Belarus), and Lamictal®, 100 mg Tablets (GlaxoSmithKline Trading Closed Joint-Stock Company (CJSC), Russia), in Healthy Volunteers Under Fasting Conditions
Overview
- Phase
- Phase 1
- Intervention
- Lamotrigine
- Conditions
- Healthy Adults
- Sponsor
- Pharmtechnology LLC
- Enrollment
- 28
- Locations
- 1
- Primary Endpoint
- Cmax of lamotrigine for the test and the reference products
- Status
- Completed
- Last Updated
- 6 years ago
Overview
Brief Summary
This is an open-labeled, randomized, crossover, two-period, single-center, comparative study, where each participant will be randomly assigned to the reference (Lamictal, 100 mg tablets) or the test (Lamotrigine, 100 mg tablets) formulation in each period of study (sequences Test-Reference (TR) or Reference-Test (RT)), in order to evaluate if both formulations are bioequivalent
Detailed Description
The objective of this study is to establish if two formulations of lamotrigine are bioequivalent. Also monitoring, registration and evaluation of adverse events that can be performed. The test formulation is Lamotrigine, Tablets 100 mg (Pharmtechnology LLC, Belarus). The reference formulation is Lamictal®, Tablets 100 mg (GlaxoSmithKlein Trading CJSC, Russia). 28 healthy adult volunteers of both genders, with age ranging from 18 to 45 years old, will be divided into two cohorts with equal number of subjects (14). Each participant in a cohort will receive single tablet (100 mg of lamotrigine) of the test or the reference products with 200 ml of water after an overnight fast of at least 10 hours. Participants will fast 4 hours after administration of the study drugs. Next meals will be after 6, 9 and 12 hours after administration of formulations. Standardized meals will be provided in each study period. Water will not be accessible to the participants 1 hour prior to administration of the study drugs and 2 hours after administration of the study drugs in each period. In each period blood samples will be collected during 30 minutes before dosing and 0.5, 1.00, 1.5, 1.75, 2.00, 2.25, 2.5, 2.75, 3.00, 3.5, 4.00, 5.00, 6.00, 8.00, 10.00, 12.00, 24.00, 36.00, 48.00, 72.00, 96.00, 120.00 hours after dosing (total number: 23). The washout period will be 21 days. At the bio-analytical stage, a validated High Performance Liquid Chromatography with tandem Mass Spectrometry detection (HPLC/MS) method will be used to determine plasma concentrations of lamotrigine. ANOVA will be performed on log transformed pharmacokinetic parameters Cmax, Area Under the pharmacokinetic Curve from the beginning of the study till the time of the last measured concentration (AUC0-t) and 90% confidence interval will be constructed for the ratio of geometric means of the test and the reference products, obtained from the log-transformed data. Bioequivalence will be concluded if the ratio estimate as well as its 90% confidence interval for lamotrigine falls within the acceptable range of 80.00% to 125.00% for Cmax and AUC0-t
Investigators
Eligibility Criteria
Inclusion Criteria
- •Healthy caucasian men or women aged between 18 to 45 years
- •Subjects having no clinically significant medical history and no clinically significant abnormalities in general physical examination, laboratory assessments and imaging studies
- •Body mass index 18.5-30 kg/m² with body mass \>45 kg and ≤100 kg
- •Non-breastfeeding women
- •Non-pregnant women (negative pregnancy test)
- •If subject is a female and is of childbearing potential, she should be practicing an acceptable non-hormonal method of birth control for the duration of the study(the entire time from the moment of signing the informed consent form and within 14 days after the completion of the study), such as a combination of male condom and diaphragm with spermicide
- •If subject is a male and has a female partner of childbearing potential, he should be practicing an acceptable method of birth control for the duration of the study(the entire time from the moment of signing the informed consent form and within 14 days after the completion of the study), such as a double barrier method of birth control or sexual continence during the whole study and within 14 days after its' completion
- •Subjects are able to understand the requirements of the study, to sign a written informed consent, and also to accept all the restrictions imposed during the course of the study, and to agree to return for the required investigations
Exclusion Criteria
- •Subjects with a known history of allergic disorders
- •Hypersensitivity to lamotrigine or to any of the excipients of the test and the reference product
- •Lactase deficiency, lactose intolerance, glucose-galactose malabsorption
- •Subjects with a known history of drug intolerance
- •Dehydration due to diarrhea, vomiting, or another cause in the last 24 hours before the beginning of the first period of the study
- •Subjects with history of psychiatric disorders
- •History of convulsions, epilepsy and any other neurological disorders
- •Adherence to any low sodium diet for 2 weeks before starting research, or adherence to a special diet (for example, vegetarian, vegan, with restriction of the use of salt) or lifestyle (work at night, extreme physical exertion)
- •Use of gestagen-containing injectable hormonal contraceptives, implants, intrauterine hormonal therapeutic systems within 6 months prior to start of the study
- •Female subjects of child bearingpotential having unprotected intercourse with an unsterilized sexual partner within 30 days prior to start of the study
Arms & Interventions
Sequence Test-Reference (TR)
14 participants (total number of enrolled volunteers - 28) assigned to sequence TR will receive a single 100 mg dose of the test product Lamotrigine (1 x 100 mg tablet) marked as T in period 1 and a single 100 mg dose of the reference product Lamictal (1 x 100 mg tablet) marked as R in period 2. These treatments will be administered orally with 200 ml of water at ambient temperature, in the morning, following a 10-hour overnight fast. The tablet must be swallowed whole and must not be chewed or broken.
Intervention: Lamotrigine
Sequence Test-Reference (TR)
14 participants (total number of enrolled volunteers - 28) assigned to sequence TR will receive a single 100 mg dose of the test product Lamotrigine (1 x 100 mg tablet) marked as T in period 1 and a single 100 mg dose of the reference product Lamictal (1 x 100 mg tablet) marked as R in period 2. These treatments will be administered orally with 200 ml of water at ambient temperature, in the morning, following a 10-hour overnight fast. The tablet must be swallowed whole and must not be chewed or broken.
Intervention: Lamictal
Sequence Reference-Test (RT)
14 participants (total number of enrolled volunteers - 28) assigned to sequence RT will receive a single 100 mg dose of the reference product Lamictal (1 x 100 mg tablet) marked as R in period 1 and a single 100 mg dose of the test product Lamotrigine (1 x 100 mg tablet) marked as T in period 2. These treatments will be administered orally with 200 ml of water at ambient temperature, in the morning, following a 10-hour overnight fast. The tablet must be swallowed whole and must not be chewed or broken.
Intervention: Lamotrigine
Sequence Reference-Test (RT)
14 participants (total number of enrolled volunteers - 28) assigned to sequence RT will receive a single 100 mg dose of the reference product Lamictal (1 x 100 mg tablet) marked as R in period 1 and a single 100 mg dose of the test product Lamotrigine (1 x 100 mg tablet) marked as T in period 2. These treatments will be administered orally with 200 ml of water at ambient temperature, in the morning, following a 10-hour overnight fast. The tablet must be swallowed whole and must not be chewed or broken.
Intervention: Lamictal
Outcomes
Primary Outcomes
Cmax of lamotrigine for the test and the reference products
Time Frame: Time points: 0,00 (within 30 minutes before dosing) and 0.5, 1.00, 1.5, 1.75, 2.00, 2.25, 2.5, 2.75.3.00, 3.5, 4.00, 5.00, 6.00, 8.00, 10.00, 12.00, 24.00, 36.00, 48.00, 72.00, 96.00, 120.00 hours after dosing
Maximum concentration in plasma among observed concentrations at pre-specified time points
AUC0-t of lamotrigine for the test and the reference products
Time Frame: Time points: 0,00 (within 30 minutes before dosing) and 0.5, 1.00, 1.5, 1.75, 2.00, 2.25, 2.5, 2.75.3.00, 3.5, 4.00, 5.00, 6.00, 8.00, 10.00, 12.00, 24.00, 36.00, 48.00, 72.00, 96.00, 120.00 hours after dosing
Area under the plasma concentration versus time curve from time 0 to the last measured concentration
Secondary Outcomes
- AUC0-∞ of lamotrigine for the test and the reference products(Time points: 0,00 (within 30 minutes before dosing) and 0.5, 1.00, 1.5, 1.75, 2.00, 2.25, 2.5, 2.75.3.00, 3.5, 4.00, 5.00, 6.00, 8.00, 10.00, 12.00, 24.00, 36.00, 48.00, 72.00, 96.00, 120.00 hours after dosing)
- Tmax of lamotrigine for the test and the reference products(Time points: 0,00 (within 30 minutes before dosing) and 0.5, 1.00, 1.5, 1.75, 2.00, 2.25, 2.5, 2.75.3.00, 3.5, 4.00, 5.00, 6.00, 8.00, 10.00, 12.00, 24.00, 36.00, 48.00, 72.00, 96.00, 120.00 hours after dosing)
- T1/2 of lamotrigine for the test and the reference products(Time points: 0,00 (within 30 minutes before dosing) and 0.5, 1.00, 1.5, 1.75, 2.00, 2.25, 2.5, 2.75.3.00, 3.5, 4.00, 5.00, 6.00, 8.00, 10.00, 12.00, 24.00, 36.00, 48.00, 72.00, 96.00, 120.00 hours after dosing)
- Kel of lamotrigine for the test and the reference products(Time points: 0,00 (within 30 minutes before dosing) and 0.5, 1.00, 1.5, 1.75, 2.00, 2.25, 2.5, 2.75.3.00, 3.5, 4.00, 5.00, 6.00, 8.00, 10.00, 12.00, 24.00, 36.00, 48.00, 72.00, 96.00, 120.00 hours after dosing)
- AUCresid% of lamotrigine for the test and the reference products(Time points: 0,00 (within 30 minutes before dosing) and 0.5, 1.00, 1.5, 1.75, 2.00, 2.25, 2.5, 2.75.3.00, 3.5, 4.00, 5.00, 6.00, 8.00, 10.00, 12.00, 24.00, 36.00, 48.00, 72.00, 96.00, 120.00 hours after dosing)
- Number of treatment-related adverse events (AE) for the test and the reference products as assessed by guidance predefined in the protocol(Up to 27 days)