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CompletedNCT00971295Updated Dec 16, 2014Results posted

Effect of Eslicarbazepine Acetate on the Pharmacokinetics of Metformin in Healthy Volunteers

A Phase 1 interventional study of Metformin and Eslicarbazepine acetate in Neuropathic Pain, sponsored by Bial - Portela C S.A.. Completed at 1 site in Portugal. Open to participants aged 18 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2014-12-16.

Sponsored by Bial - Portela C S.A. · Phase 1, Interventional, and Treatment

Phase
Phase 1
Study type
Interventional
Enrollment
20
Allocation
Randomized
Ages
18 Years to 45 Years
Sex
All
01

Study summary

The primary objective was to investigate whether multiple-dose administration of eslicarbazepine acetate affects the pharmacokinetics of metformin.

02

Conditions studied

  • Neuropathic Pain

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Keywords

  • eslicarbazepine acetate
  • zebinix
  • metformin
03

In context

Neuralgia

1,287 studies on the registry are indexed under Neuralgia; 256 are open to participants now.

This study's enrollment of 20 is below the median of 52 across 973 interventional studies indexed under Neuralgia.

Browse Neuralgia studies →

Lead sponsor

Bial - Portela C S.A. is the lead sponsor of 133 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 45 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Male or female subjects aged between 18 and 45 years, inclusive.
  • Body mass index (BMI) between 19 and 30 kg/m2, inclusive.
  • Healthy as determined by pre-study medical history, physical examination, vital signs, complete neurological examination and 12-lead ECG.
  • Negative tests for HBsAg, anti-HCVAb and HIV-1 and HIV-2 Ab at screening
  • Clinical laboratory test results clinically acceptable at screening and admission to each treatment period.
  • Negative screen for alcohol and drugs of abuse at screening and admission to each treatment period.
  • Non-smokers or who smoke ≤ 10 cigarettes or equivalent per day.
  • Able and willing to give written informed consent.
  • (If female) Not of childbearing potential by reason of surgery or, if of childbearing potential, she used one of the following methods of contraception: double barrier or intrauterine device.
  • (If female) Negative urine pregnancy test at screening and admission to each treatment period.

Exclusion criteria

Exclusion Criteria:

  • Clinically relevant history or presence of respiratory, gastrointestinal, renal, hepatic, haematological, lymphatic, neurological, cardiovascular, psychiatric, musculoskeletal, genitourinary, immunological, dermatological, endocrine, connective tissue diseases or disorders.
  • Clinically relevant surgical history.
  • History of relevant atopy or drug hypersensitivity.
  • History of alcoholism or drug abuse.
  • Consumed more than 14 units of alcohol a week.
  • Significant infection or known inflammatory process at screening or admission to each treatment period.
  • Acute gastrointestinal symptoms (e.g., nausea, vomiting, diarrhoea, heartburn) at the time of screening or admission to each treatment period.
  • Used medicines within 2 weeks of admission to first period that may affect the safety or other study assessments, in the investigator's opinion.
  • Used any investigational drug or participated in any clinical trial within 6 months prior to screening.
  • Participated in more than 2 clinical trials within the 12 months prior to screening.
  • Donated or received any blood or blood products within the 3 months prior to screening.
  • Vegetarians, vegans or with medical dietary restrictions.
  • Could not communicate reliably with the investigator.
  • Unlikely to co-operate with the requirements of the study.
  • Unwilling or unable to give written informed consent.
  • (If female) Pregnant or breast-feeding.
  • (If female) Of childbearing potential and she did not use an approved effective contraceptive method (double-barrier or intra-uterine device) or she used oral contraceptives.
05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
20 participants (actual)

Study arms

  • Experimental
    Treatment Sequence A

    Eslicarbazepine acetate + Metformin period followed by washout period followed by Metformin period

    Drug: Metformin · Drug: Eslicarbazepine acetate

  • Experimental
    Treatment Sequence B

    Metformin period followed by washout period followed by Eslicarbazepine acetate + Metformin period

    Drug: Metformin · Drug: Eslicarbazepine acetate

Interventions

  • DrugMetformin

    850 mg metformin hydrochloride, once as oral single-dose and once after pre-treatment with once-daily dose of ESL 1200 mg for 6 days

    Also known as: Glucophage

  • DrugEslicarbazepine acetate

    Also known as: Zebinix

06

What researchers measure

Primary outcomes

  1. Cmax - Maximum Observed Plasma Concentration

    Maximum Observed Plasma Metformin Concentration

    Time frame: 3 weeks

Secondary outcomes

  1. Tmax - Time of Occurrence of Cmax

    time of occurrence of maximum observed plasma metformin concentration

    Time frame: 3 weeks

  2. AUC0-∞ - Area Under the Plasma Concentration From Time Zero to Infinity

    area under the plasma metformin concentration from time zero to infinity

    Time frame: 3 weeks

07

Results

Posted Dec 16, 2014

Participant flow

Participant flow — Overall Study
MilestoneTreatment Sequence ATreatment Sequence B
Started1010
Completed109
Not completed01

Outcome measures

PrimaryCmax - Maximum Observed Plasma Concentration

Maximum Observed Plasma Metformin Concentration

Time frame:
3 weeks
Reported as:
Mean · ng/mL
Cmax - Maximum Observed Plasma Concentration
ng/mLMetformin + ESLMetformin
Cmax - Maximum Observed Plasma Concentration1091 ± 27.61224 ± 21.9
SecondaryTmax - Time of Occurrence of Cmax

time of occurrence of maximum observed plasma metformin concentration

Time frame:
3 weeks
Reported as:
Mean · hours
Tmax - Time of Occurrence of Cmax
hoursMetformin + ESLMetformin
Tmax - Time of Occurrence of Cmax2.66 ± 46.92.53 ± 40.4
SecondaryAUC0-∞ - Area Under the Plasma Concentration From Time Zero to Infinity

area under the plasma metformin concentration from time zero to infinity

Time frame:
3 weeks
Reported as:
Mean · ng*h/mL
AUC0-∞ - Area Under the Plasma Concentration From Time Zero to Infinity
ng*h/mLMetformin + ESLMetformin
AUC0-∞ - Area Under the Plasma Concentration From Time Zero to Infinity7362 ± 26.77688 ± 21.4

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Metformin + ESL—0/20 (0%)9/20 (45%)
Metformin—0/20 (0%)5/20 (25%)
Most frequent other events
Showing 10 of 13
Most frequent other events
EventMetformin + ESLMetformin
HeadacheNervous system disorders2/200/20
Erythropapular rashSkin and subcutaneous tissue disorders0/201/20
Vasovagal reactionNervous system disorders0/201/20
ConstipationGeneral disorders1/200/20
Herpes labialisInfections and infestations0/201/20
Right forearm ecchymosisGeneral disorders1/200/20
Recurrent vasovagal reactionNervous system disorders0/201/20
Nasal congestionRespiratory, thoracic and mediastinal disorders0/201/20
Bilateral popliteal erythromacular rashSkin and subcutaneous tissue disorders1/200/20
Eczema aggravatedSkin and subcutaneous tissue disorders1/200/20

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Metformin + ESL
<=18 years0
Between 18 and 65 years20
>=65 years0
Sex: Female, Male
Sex: Female, Male(Participants)Metformin + ESL
Female10
Male10
08

Study locations

1 site
  • Human Pharmacology Unit (UFH)Section of Clinical Research (SIC), Department of Research & Development (DID), BIAL - Portela & Cª, SA,
    Mamede do Coronado, Portugal
09

References and documents

Publications

  • Rocha JF, Vaz-da-Silva M, Almeida L, Falcao A, Nunes T, Santos AT, Martins F, Fontes-Ribeiro C, Macedo T, Soares-da-Silva P. Effect of eslicarbazepine acetate on the pharmacokinetics of metformin in healthy subjects. Int J Clin Pharmacol Ther. 2009 Apr;47(4):255-61. doi: 10.5414/cpp47255. PubMed 19356391 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 16, 2014, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00971295
Lead sponsor
Bial - Portela C S.A.
Responsible party
Sponsor
First posted
Sep 3, 2009
Start date
Oct 2007
Primary completion
Dec 2007
Completion
Sep 2008
Results posted
Dec 16, 2014
Last update
Dec 16, 2014

Study contacts

Manuel Vaz-da-Silva, MD, PhD
principal investigator · BIAL - Portela & Ca, S.A

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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