A Open-label, Drug Interaction Study Between Eslicarbazepine Acetate and Topiramate

Study Overview
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Brief Summary
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Single centre, open-label, multiple doses, one-sequence design study in two parallel groups of healthy volunteers

Detailed Description
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Single centre, open-label, multiple doses, one-sequence design study in two parallel groups of healthy volunteers: Group A: Pre-treatment with ESL, treatment with ESL and ascending doses of Topamax (TPM) in last phases; Group B: Pre-treatment with TPM, treatment with TPM and ascending doses of ESL in last phases

Official Title
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A Phase-1, Open-label, Drug Interaction Study Between Eslicarbazepine Acetate 1200 mg and Topiramate 200 mg Following Multiple Dose Administrations in Healthy Male

Conditions
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Epilepsy

Intervention / Treatment
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* Drug: BIA 2-093
* Drug: Topamax


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Availability of volunteer for the entire study period and willingness to adhere to protocol requirements as evidenced by the informed consent form (ICF) duly read, signed and dated by the volunteer Male aged of at least 18 years but not older than 45 years with a body mass índex (BMI) greater than or equal to 19 and below 30 kg/m Clinical laboratory values within the laboratory's stated normal range; i f not within this range, they must be without any clinical significance (laboratory tests are presented in section 6.1.1.3) Healthy according to the medical history, laboratory results and physical Light-, non- or ex-smokers. A light smoker is defined as someone smoking 1 0 cigarettes or less per day, and an ex-smoker i s defined as someone who completely stopped smoking for at least 1 2 months before day 1 of this study Exclusion Criteria: Significant history of hypersensitivity to topiramate, eslicarbazepine, oxcarbazepine, carbamazepine or any related products (including excipients of the formulations) as wel l as severe hypersensitivity reactions (like angioedema) to any drugs Presence of significant gastrointestinal, l iver or kidney disease, or any other conditions known to interfere with the absorption, distribution, metabolism or excretion of drugs or known to potentiate or predispose to undesired effects History of significant gastrointestinal, liver o r kidney disease, o r surgery that may affect drug bioavailability, including but not limited to cholecystectomy Presence of significant cardiovascular, pulmonary, hematologic, neurologic, psychiatric, endocrine, immunologic or dermatologic d isease Presence o f significant heart disease o r disorder according to ECG Presence or history of significant central nervous system disorder l ike convulsion or depression Presence o r history o f significant ocular disease Presence or history of severe hepatic impairment Presence or history of renal insufficiency (serum creatinine level greater than 135 μmol/L) History or presence of acidosis Use of valproic acid in the previous 7 days prior to Day 1 of the study. Maintenance therapy with any drug, or significant history of drug dependency or alcohol abuse (> 3 units of alcohol per day, intake of excessive alcohol, acute or chronic) Any clinically significant illness in the previous 28 days before day 1 of this study Use of any enzyme-modifying drugs, including strong inhibitors of cytochrome P450 (CYP) enzymes (such as cimetidine, fluoxetine, quinidine, erythromycin, ciprofloxacin, fluconazole, ketoconazole, diltiazem and HIV antivirals) and strong inducers of CYP enzymes (such as barbiturates, carbamazepine, glucocorticoids, phenytoin and rifampin), in the previous 28 days before Day 1 of this study Participation in another clinical trial or donation of 50 mL or more of blood in the previous 28 days before day 1 of this study Donation of 500 mL or more of blood (Canadian B lood Services, Hema-Quebec, clinical studies, etc.) in the previous 56 days before day 1 of this study Positive urine screening of drugs of abuse (drugs listing is presented in section 6.1.1.4). Positive results to HIV, HBsAg or anti-HCV tests

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Group A BIA 2-093 + Topamax<br>Group A Pre-treatment: 600 mg once daily dose of eslicarbazepine acetate (ESL) administered for two consecutive days; Treatment 1: 1200 mg once daily dose of eslicarbazepine acetate (ESL) administered for six consecutive days Treatment 2: Concomitant doses of eslicarbazepine acetate (ESL) 1200 mg and TPM 100 mg for two consecutive days Treatment 3: Concomitant doses of eslicarbazepine acetate (ESL) 1200 mg and TPM 100 mg (morning) + 100mg (evening) for two consecutive days Treatment 4: Concomitant doses of eslicarbazepine acetate (ESL) 1200 mg and TPM 200 mg for fifteen consecutive days | Drug: BIA 2-093<br> <br> * Other names: ESL, Eslicarbazepine acetate;Drug: Topamax<br> <br> * Other names: TPM;|
| Experimental: Group B BIA 2-093 + Topamax<br>Pre-treatment: 100 mg once daily dose of TPM administered for two consecutive days; Pre-treatment 2: 100 mg twice daily dose of TPM administered for two consecutive days; Treatment: 200 mg once daily dose of TPM administered for four consecutive days; Treatment 2: Concomitant doses of eslicarbazepine acetate (ESL) 600 mg and TPM 200 mg for two consecutive days Treatment 3: Concomitant doses of eslicarbazepine acetate (ESL) 1200 mg and TPM 200mg for seventeen consecutive days | Drug: BIA 2-093<br> <br> * Other names: ESL, Eslicarbazepine acetate;Drug: Topamax<br> <br> * Other names: TPM;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cmax - the Maximum Plasma Concentration | BIA 2-194 and BIA 2-195 are metabolites/active forms of eslicarbazepine acetate | Time Frame: Group A:Day 8 and 27: within 5 minutes prior to dosing and 0.5,1,1.5,2,2.5,3,3.5,4,6,9,12,16 and 24 hours after drug administration; Group B: Day 8 and 27 within 5 minutes prior dosing and 0.25,0.5,0.75,1,1.33,1.67,2,2.5,3,4,6,9,12,16 and 24h | 
| Tmax - the Time of Occurrence of Cmax | BIA 2-194 and BIA 2-195 are metabolites/active forms of eslicarbazepine acetate Both Groups A and B described in participant flow recieved BIA 2-093 and Topiramate. The results presented here are related with the different interventions in both groups | Time Frame: Group A:Day 8 and 27: within 5 minutes prior to dosing and 0.5,1,1.5,2,2.5,3,3.5,4,6,9,12,16 and 24 hours after drug administration; Group B: Day 8 and 27 within 5 minutes prior dosing and 0.25,0.5,0.75,1,1.33,1.67,2,2.5,3,4,6,9,12,16 and 24h | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| AUCτ - Cumulative Area Under the Plasma Concentration Time Curve Over the Dosing Interval at Steady State. |  | Time Frame: Group A:Day 8 and 27: within 5 minutes prior to dosing and 0.5,1,1.5,2,2.5,3,3.5,4,6,9,12,16 and 24 hours after drug administration; Group B: Day 8 and 27 within 5 minutes prior dosing and 0.25,0.5,0.75,1,1.33,1.67,2,2.5,3,4,6,9,12,16 and 24h |