Anxiety Disorder, Anxiety Disorders
Conditions
Keywords
Generalized Anxiety Disorder
Brief summary
This study is designed to evaluate the efficacy and safety in Generalized Anxiety Disorder patients
Detailed description
This study was a multi-center, randomized, placebo-controlled, double-blinded (placebo run-in will be single-blinded), group comparison study. Paroxetine 20mg/day (achieved via the starting dose of 10 mg/day for the first week) once daily, or placebo was orally administered once daily for 8 weeks (fixed dose was adopted in the Treatment phase) in patients with GAD. For subjects who were classed as non-responders at Week 8, paroxetine at 30 to 40mg/day (once daily) or placebo (once daily) was orally administered with flexible titration regimen for 4 weeks (fixed dose was adopted in the Treatment phase). The subjects underwent a taper phase in case they received Paroxetine 40mg/day, paroxetine 30mg/day or placebo at treatment completion or study withdrawal. A follow-up examination was conducted after 1 to 5 weeks from the last dose of the investigational product. The overall study duration requiring subject participation was 10 to 20 weeks.
Interventions
DRUGParoxetine
Fixed Dose (20 mg/day): The fixed dose of 20 mg/day was selected, because it is the recommended dose for the treatment of GAD in the US and other countries. Flexible Dose (20 - 40 mg/day): Overseas, the maximum dose in the treatment of GAD is 50 mg/day. However, 40 mg/day was selected as the maximum dose for this flexible dose session, because overseas clinical studies have indicated that paroxetine is sufficiently effective at doses of 20 - 40 mg/day and this is the dose range approved for depression/depressive episodes in Japan.
DRUGPlacebo
Placebo
Sponsors
GlaxoSmithKline
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Diagnosis of Generalized Anxiety Disorder (GAD) according to Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) criteria. * Must give a written informed consent. But if the patient is under 20, both the patient himself/herself and his/her proxy consenter must give written informed consent.
Exclusion criteria
* Have the following conditions currently or diagnosed in the past 24 weeks: Major Depressive Episode, Panic Disorder Without Agoraphobia, Panic Disorder With Agoraphobia, Social phobia/social anxiety disorder (SAD), Agoraphobia Without History of Panic Disorder, Posttraumatic Stress Disorder, Obsessive Compulsive Disorder, Anorexia Nervosa, Bulimia Nervosa, Dysthymic disorder * Current or history of schizophrenia, bipolar disorder or cyclothymic disorder. * Psychotherapy or cognitive behavioral therapy other than supportive psychotherapy. * Current or history of substance abuse (alcohol or drugs) or substance in past 24 weeks. * Taken St. John's Wort in past 4 weeks. * Had electroconvulsive therapy (ECT) in past 12 weeks. * Had psychotherapy or cognitive behavioral therapy other than supportive psychotherapy within 24 weeks. * Women who are pregnant or lactating, who may be pregnant, or who plan for pregnancy by 30 days after the completion of final dose. * Pose a suicidal threat or have attempted suicide in past 24 weeks. * History of convulsive disorder (epilepsy, etc.). * Significant unstable medical illness. * Current or history of glaucoma. * History or complication of cancer or malignant tumor. * History of hypersensitivity to paroxetine.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Mean change from baseline in the Hamilton Anxiety Scale (HAM-A) total score (at Week 8, last observation carried forward [LOCF]) | 8 Weeks |
Secondary
| Measure | Time frame |
|---|---|
| Mean change from baseline in the HAM-A score (at Weeks 1, 2, 4 and 6); in the Severity of Illness (CGI SI) score; in the SDS and MADRS total scoreProportion of responders based on the Clinical Global Impression Global Improvement (CGI GI) score | 8 Weeks |
Outcome results
None listed