CClinicalTrials.gg
CompletedNCT00961441Updated Aug 6, 2015Results posted

Study Evaluating the Pharmacokinetics of Keppra Extended Release (XR) in Children and Adults With Epilepsy

A Phase 2 interventional study of Keppra XR in Epilepsy, sponsored by UCB BIOSCIENCES, Inc.. Completed at 6 sites in United States. Open to participants aged 12 Years to 55 Years. Per ClinicalTrials.gov, last updated 2015-08-06.

Sponsored by UCB BIOSCIENCES, Inc. · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
25
Allocation
Non-randomized
Ages
12 Years to 55 Years
Sex
All
01

Study summary

To study how the body absorbs, distributes, metabolises and eliminates Keppra XR in both children (12 to 16 years old) and adults (18 to 55 years old) with epilepsy.

02

Conditions studied

  • Epilepsy

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Keywords

  • Levetiracetam
  • Epilepsy
  • Children
  • Adults
03

In context

Epilepsy

1,805 studies on the registry are indexed under Epilepsy; 417 are open to participants now.

This study's enrollment of 25 is below the median of 50 across 1,206 interventional studies indexed under Epilepsy.

Browse Epilepsy studies →

Lead sponsor

UCB BIOSCIENCES, Inc. is the lead sponsor of 28 studies on the registry; 2 are open to participants now.

Of its 5 completed or terminated interventional studies of FDA-regulated products, 3 (60%) have results posted.

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

04

Who can participate

Ages eligible
12 Years to 55 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Subjects with a diagnosis of epilepsy on up to three concomitant anti-epileptic drugs
  • Subjects on levetiracetam immediate release (IR) can be enrolled if on a stable dose for 7 days

Exclusion criteria

Exclusion Criteria:

  • Subjects with a history of status epilepticus within 3 months of Visit 1
  • Subject has difficult venous accessibility
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
25 participants (actual)

Study arms

  • Experimental
    Children 12-16 years old

    Drug: Keppra XR

  • Experimental
    Adults 18-55 years old

    Drug: Keppra XR

Interventions

  • DrugKeppra XR

    Keppra XR 500 mg tablets and Keppra XR 750 mg tablets Dosage: Keppra XR 1000-3000 mg/day taken once daily. Duration: 4-7 days

    Also known as: Levetiracetam XR

06

What researchers measure

Primary outcomes

  1. Maximum Concentration at Steady State (Cmax) of Keppra XR Normalized by Dose and by Body Weight and Dose During up to 7 Days of Administration

    The Cmax is the maximum plasma concentration normalized by dose and by body weight and dose. Cmax normalized by 1000 mg dose was calculated as: Cmax/(mg dose taken/ 1000 mg Keppra XR). Cmax normalized by body weight and dose (1 mg Keppra XR/kg) was calculated as: Cmax/(bodyweight (kg)/ mg dose Keppra XR taken). Pharmacokonetic (PK) samples were taken predose and 1h, 2.5h, 4h, 6h and 10h after study medication at day 4, 5, 6 or 7 of Keppra XR administration.

    Time frame: 6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.

  2. Area Under the Plasma Concentration Curve Over a Dosing Interval of 24 Hours (AUCtau) of Keppra XR Normalized by Dose, and by Body Weight and Dose During up to 7 Days of Administration

    AUCtau normalized by 1000 mg dose was calculated as: AUCtau/(mg dose taken/ 1000 mg Keppra XR). AUCtau normalized by body weight and dose (1 mg Keppra XR/kg) was calculated as: AUCtau/(bodyweight (kg)/ mg dose Keppra XR taken). 6 PK samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration. At steady state, reached after 2 days of administration of Keppra XR, the concentrations at 24h postdose is equal to the predose concentration. The predose concentration was used as the 24h concentration to calculate AUCτau.

    Time frame: 6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.

  3. Time of Maximum Plasma Concentration (Tmax) of Keppra XR During up to 7 Days of Administration

    The Tmax is the time corresponding to the maximum plasma concentration of Keppra XR. It was directly obtained from the observed concentration versus time curve. 6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.

    Time frame: 6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.

  4. Apparent Total Body Clearance (CL/F) of Keppra XR During up to 7 Days of Administration

    The Apparent Total Body Clearance (CL/F) was calculated as Dose/ AUCtau. 6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.

    Time frame: 6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.

Secondary outcomes

  1. Occurrence of Treatment-Emergent Adverse Events From Starting Study Drug Treatment (Day 1) to up to 14 Days

    An Adverse Event (AE) is any untoward medical occurrence in a subject or clinical investigation subject administered a pharmaceutical product which does not necessarily have a causal relationship with this treatment. Treatment emergent means that an AE has begun or got worse after start of Keppra XR administration.

    Time frame: From Starting Study Drug Treatment (Day 1) to up to 14 days

07

Results

Posted May 25, 2011

Participant flow

Intent-to-treat (ITT) population includes all enrolled patients who received at least one dose of study medication.Pharmacokinetic Per-Protocol (PK-PP) population is a subset of the ITT population, consisting of those patients who had no major protocol deviations affecting the pharmacokinetic parameters.

Participant flow — Overall Study
MilestoneKeppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)
Started1213
Pharmacokinetic (pk-pp) population1210
Completed1213
Not completed00

Outcome measures

PrimaryMaximum Concentration at Steady State (Cmax) of Keppra XR Normalized by Dose and by Body Weight and Dose During up to 7 Days of Administration

The Cmax is the maximum plasma concentration normalized by dose and by body weight and dose. Cmax normalized by 1000 mg dose was calculated as: Cmax/(mg dose taken/ 1000 mg Keppra XR). Cmax normalized by body weight and dose (1 mg Keppra XR/kg) was calculated as: Cmax/(bodyweight (kg)/ mg dose Keppra XR taken). Pharmacokonetic (PK) samples were taken predose and 1h, 2.5h, 4h, 6h and 10h after study medication at day 4, 5, 6 or 7 of Keppra XR administration.

Time frame:
6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.
Reported as:
Geometric mean · µg/mL
Maximum Concentration at Steady State (Cmax) of Keppra XR Normalized by Dose and by Body Weight and Dose During up to 7 Days of Administration
µg/mLKeppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)
Dose norm. ( Keppra XR 1000mg)17.3 (14.3 to 21.0)14.9 (12.1 to 18.5)
Dose and weight norm. ( Keppra XR 1 mg/kg)1.27 (1.12 to 1.44)1.24 (1.08 to 1.42)
Statistical analysis
  • Keppra XR in Children (12-16 Years Old) vs Keppra XR in Adults (18-55 Years Old) · ANOVA · Point estimate for ratio: 1.0271 · 90% CI 0.8817 to 1.1964Point estimates for the geometric means ratios children/adults for Cmax normalized by dose and body weight and 90% CIs have been calculated.
PrimaryArea Under the Plasma Concentration Curve Over a Dosing Interval of 24 Hours (AUCtau) of Keppra XR Normalized by Dose, and by Body Weight and Dose During up to 7 Days of Administration

AUCtau normalized by 1000 mg dose was calculated as: AUCtau/(mg dose taken/ 1000 mg Keppra XR). AUCtau normalized by body weight and dose (1 mg Keppra XR/kg) was calculated as: AUCtau/(bodyweight (kg)/ mg dose Keppra XR taken). 6 PK samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration. At steady state, reached after 2 days of administration of Keppra XR, the concentrations at 24h postdose is equal to the predose concentration. The predose concentration was used as the 24h concentration to calculate AUCτau.

Time frame:
6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.
Reported as:
Geometric mean · µg*h/mL
Area Under the Plasma Concentration Curve Over a Dosing Interval of 24 Hours (AUCtau) of Keppra XR Normalized by Dose, and by Body Weight and Dose During up to 7 Days of Administration
µg*h/mLKeppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)
Dose norm. (Keppra XR 1000mg)265 (214 to 327)236 (187 to 298)
Dose and weight norm. (Keppra XR 1 mg/kg)19.4 (16.5 to 22.9)19.6 (16.4 to 23.5)
Statistical analysis
  • Keppra XR in Children (12-16 Years Old) vs Keppra XR in Adults (18-55 Years Old) · ANOVA · Point estimate for ratio: 0.9914 · 90% CI 0.8110 to 1.2118Point estimates for the geometric means ratios children/adults for AUCtau normalized by dose and body weight and 90% CIs have been calculated.
PrimaryTime of Maximum Plasma Concentration (Tmax) of Keppra XR During up to 7 Days of Administration

The Tmax is the time corresponding to the maximum plasma concentration of Keppra XR. It was directly obtained from the observed concentration versus time curve. 6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.

Time frame:
6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.
Reported as:
Median · hours (h)
Time of Maximum Plasma Concentration (Tmax) of Keppra XR During up to 7 Days of Administration
hours (h)Keppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)
Time of Maximum Plasma Concentration (Tmax) of Keppra XR During up to 7 Days of Administration5.90 (2.50 to 6.07)5.93 (2.45 to 6.05)
PrimaryApparent Total Body Clearance (CL/F) of Keppra XR During up to 7 Days of Administration

The Apparent Total Body Clearance (CL/F) was calculated as Dose/ AUCtau. 6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.

Time frame:
6 pharmacokinetic samples were taken pre-dose, 1, 2.5, 4, 6 and 10 hours after administration, at Day 4, 5, 6, or 7 of Keppra XR administration.
Reported as:
Geometric mean · L/h
Apparent Total Body Clearance (CL/F) of Keppra XR During up to 7 Days of Administration
L/hKeppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)
Apparent Total Body Clearance (CL/F) of Keppra XR During up to 7 Days of Administration3.78 ± 31.44.23 ± 41.8
SecondaryOccurrence of Treatment-Emergent Adverse Events From Starting Study Drug Treatment (Day 1) to up to 14 Days

An Adverse Event (AE) is any untoward medical occurrence in a subject or clinical investigation subject administered a pharmaceutical product which does not necessarily have a causal relationship with this treatment. Treatment emergent means that an AE has begun or got worse after start of Keppra XR administration.

Time frame:
From Starting Study Drug Treatment (Day 1) to up to 14 days
Reported as:
Number · Count
Occurrence of Treatment-Emergent Adverse Events From Starting Study Drug Treatment (Day 1) to up to 14 Days
CountKeppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)
Total number of AEs711
Patients with at least 1 AE33
Patients with severe AEs01
Patients with serious AEs00

Adverse events

Collected over From Starting Study Drug Treatment (Day 1) to up to 14 days.. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Keppra XR in Children (12-16 Years Old)—0/12 (0%)3/12 (25%)
Keppra XR in Adults (18-55 Years Old)—0/13 (0%)3/13 (23.1%)
Most frequent other events
Showing 10 of 14
Most frequent other events
EventKeppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)
SomnolenceNervous system disorders1/121/13
NauseaGastrointestinal disorders1/121/13
VomitingGastrointestinal disorders1/121/13
FatigueGeneral disorders1/120/13
LymphadenopathyBlood and lymphatic system disorders1/120/13
Pharyngitis streptococcalInfections and infestations1/120/13
Abnormal behaviourPsychiatric disorders1/120/13
ParaesthesiaNervous system disorders0/121/13
IrritabilityGeneral disorders0/121/13
ArthralgiaMusculoskeletal and connective tissue disorders0/121/13

Baseline characteristics

Age, Continuous
Age, Continuous(years)Keppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)Total
Mean14.88 ± 1.3741.78 ± 9.2128.87 ± 15.21
Sex: Female, Male
Sex: Female, Male(Participants)Keppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)Total
Female6814
Male6511
Weight
Weight(kilogram (kg))Keppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)Total
Mean77.2 ± 24.182.5 ± 23.080.0 ± 23.2
Height
Height(centimeter (cm))Keppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)Total
Mean165.9 ± 8.8169.3 ± 10.3167.7 ± 9.6
Body Mass Index (BMI)
Body Mass Index (BMI)(kg/m^2)Keppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)Total
Mean27.62 ± 7.0128.63 ± 7.1428.14 ± 6.95
Body Surface Area (BSA)
Body Surface Area (BSA)(m^2)Keppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)Total
Mean1.87 ± 0.341.95 ± 0.321.91 ± 0.32
Race
Race(Participants)Keppra XR in Children (12-16 Years Old)Keppra XR in Adults (18-55 Years Old)Total
Black437
Caucasian8917
Other / mixed011
08

Study locations

6 sites
  • Mobile, Alabama, United States
  • Phoenix, Arizona, United States
  • Little Rock, Arkansas, United States
  • Fairfield, Connecticut, United States
  • Bethesda, Maryland, United States
  • Dallas, Texas, United States
09

References and documents

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 6, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00961441
Lead sponsor
UCB BIOSCIENCES, Inc.
Responsible party
Sponsor
First posted
Aug 19, 2009
Start date
Sep 2009
Primary completion
Mar 2010
Completion
Mar 2010
Results posted
May 25, 2011
Last update
Aug 6, 2015

Study contacts

UCB Clinical Trial Call Center
study director · +1 877 822 9493 (UCB)

Oversight

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

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