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Special Drug Use Investigation for PAXIL Tablet (Long-term)

This study has been completed.
Information provided by (Responsible Party):
GlaxoSmithKline Identifier:
First received: June 9, 2011
Last updated: June 7, 2017
Last verified: May 2017
This surveillance study is designed to detect adverse events (particularly clinically significant adverse drug reactions) occurring in clinical settings and to examine factors likely to affect the safety and efficacy of paroxetine in long-term use (1 year).

Condition Intervention
Mental Disorders Drug: Paroxetine

Study Type: Observational
Study Design: Observational Model: Other
Time Perspective: Prospective
Official Title: Special Drug Use Investigation for PAXIL Tablet (Long-term)

Resource links provided by NLM:

Further study details as provided by GlaxoSmithKline:

Primary Outcome Measures:
  • Incidence of adverse events in Japanese subjects treated with paroxetine tablet based on prescribing information under the conditions of general clinical practice [ Time Frame: 1 year ]
  • Presence/absence of concomitant use of drugs metabolized by CYP2D6 [ Time Frame: Within 2 weeks after discontinuation or completion of treatment ]
    PAXIL inhibits drug-metabolizing enzyme CYP2D6, and it takes about 1 week following discontinuation of PAXIL for this CYP2D6 function to recover from the inhibiting effect. Since it requires attention if drugs that are metabolized by CYP2D6 are administered during this recovery period, it was decided to investigate the presence/absence of use of drugs metabolized by CYP2D6 within 2 weeks after discontinuation of treatment in patients for whom treatment with PAXIL was discontinued, as well as the safety thereof.

  • Presence/absence of concomitant use of products containing Saint John's Wort (Hypericum perforatum; "SJW", hereinafter) [ Time Frame: 1 year ]
    Although the action mechanism for this is not clear, SJW has been reported to have the action of inhibiting reuptake of serotonin, noradrenaline and dopamine, and to exhibit an antidepressant effect. Since PAXIL also acts to inhibit serotonin reuptake, concomitant use of products containing SJW is thought to have an effect upon the serotonin reuptake inhibiting action of PAXIL, so it was decided to check for concomitant use of products containing SJW and investigate the safety of such concomitant use.

Enrollment: 339
Study Start Date: May 2001
Study Completion Date: September 2005
Primary Completion Date: September 2004 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
Patients prescribed PAXIL for long-term use
Patients with depression/depressed state or panic disorder prescribed PAXIL during study period
Drug: Paroxetine


Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Sampling Method:   Probability Sample
Study Population
Patients with depression/depressed state or panic disorder which are the indications of PAXIL for long-term use

Inclusion Criteria:

  • Patients with depression/depressed state or panic disorder
  • PAXIL must be used for long-term

Exclusion Criteria:

  • Patients who had been taking PAXIL since before the start of the survey
  • Patients with hypersensitivity to paroxetine
  • Patients taking monoamine oxidase inhibitors (MAOIs) or within 2 weeks of stopping treatment with MAOIs
  • Concomitant use in patients taking pimozide
  Contacts and Locations
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Please refer to this study by its identifier: NCT01371448

Sponsors and Collaborators
Study Director: GSK Clinical Trials GlaxoSmithKline
  More Information

Responsible Party: GlaxoSmithKline Identifier: NCT01371448     History of Changes
Other Study ID Numbers: 112302
Study First Received: June 9, 2011
Last Updated: June 7, 2017

Additional relevant MeSH terms:
Mental Disorders
Psychotic Disorders
Schizophrenia Spectrum and Other Psychotic Disorders
Serotonin Uptake Inhibitors
Neurotransmitter Uptake Inhibitors
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Serotonin Agents
Physiological Effects of Drugs
Antidepressive Agents, Second-Generation
Antidepressive Agents
Psychotropic Drugs
Cytochrome P-450 CYP2D6 Inhibitors
Cytochrome P-450 Enzyme Inhibitors
Enzyme Inhibitors processed this record on August 22, 2017