Drug Use Investigation Of Gabapentin

This study has been completed.
Information provided by (Responsible Party):
ClinicalTrials.gov Identifier:
First received: November 16, 2007
Last updated: June 10, 2014
Last verified: June 2014

The objective of the this surveillance is to collect information about 1)adverse drug reactions not expected from the LPD (unknown adverse drug reactions), 2) the incidence of adverse drug reactions in this surveillance, and 3) factors considered to affect the safety and/or efficacy of this drug.

Condition Intervention Phase
Epilepsies, Partial
Drug: Gabapentin
Phase 4

Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Drug Use Investigation Of Gabapentin

Resource links provided by NLM:

Further study details as provided by Pfizer:

Primary Outcome Measures:
  • The number of adverse drug reactions not expected from the LPD (unknown adverse drug reactions). [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
  • The incidence of adverse drug reactions. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
  • Factors considered to affect the safety and/or efficacy of this drug. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]

Enrollment: 1273
Study Start Date: August 2007
Study Completion Date: May 2014
Primary Completion Date: May 2014 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
Patients taking Gabapentin
Drug: Gabapentin

GABAPEN Tablets 200mg, GABAPEN Tablets 300mg, GABAPEN Tablets 400mg. GABAPEN is Brand name in Japan.

Dosage, frequency: According to Japanese LPD, "Normally, oral gabapentin 600 mg, 3 div., should be given on the first day of administration and an effective dose of 1200mg, 3 div, should be given on day 2. From day 3 on, adults should be maintained on oral gabapentin 1200 mg to 1800 mg, 3 div. Subsequently, the maintenance dose should be suitably adjusted depending on the symptoms (up to a maximum daily dose of 2400 mg)".

Duration: According to the protocol of A9451163, the duration of the investigation for findings regarding safety and efficacy of a patient is from the first drug administration to the 12 weeks after the first administration.

Detailed Description:

All the patients whom an investigator prescribes the first Gabapentin should be registered consecutively until the number of subjects reaches target number in order to extract patients enrolled into the investigation at random.


Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population

The patients whom an investigator involving A9451163 prescribes the Gabapentin


Inclusion Criteria:

Patients need to be taking Gabapentin in order to be enrolled in the surveillance

Exclusion Criteria:

Patients not taking Gabapentin

  Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00567268

Sponsors and Collaborators
Study Director: Pfizer CT.gov Call Center Pfizer
  More Information

Additional Information:
No publications provided

Responsible Party: Pfizer
ClinicalTrials.gov Identifier: NCT00567268     History of Changes
Other Study ID Numbers: A9451163
Study First Received: November 16, 2007
Last Updated: June 10, 2014
Health Authority: Japan: Institutional Review Board

Keywords provided by Pfizer:
Post-Marketing surveillance

Additional relevant MeSH terms:
Epilepsies, Partial
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Anti-Anxiety Agents
Anti-Dyskinesia Agents
Antimanic Agents
Antiparkinson Agents
Calcium Channel Blockers
Cardiovascular Agents
Central Nervous System Agents
Central Nervous System Depressants
Excitatory Amino Acid Agents
Excitatory Amino Acid Antagonists
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Peripheral Nervous System Agents
Pharmacologic Actions
Physiological Effects of Drugs
Psychotropic Drugs
Sensory System Agents
Therapeutic Uses
Tranquilizing Agents

ClinicalTrials.gov processed this record on April 23, 2015