Anxiety Disorders Clinical Trial
Official title:
St. John's Wort And Kava In The Treatment Of Major Depressive Disorder With Comorbid Anxiety
SJW has the greatest evidence of herbal medicine efficacy in treating MDD. In treating
anxiety, kava has the greatest evidence of efficacy. As comorbidity of MDD and anxiety
commonly occurs, it is conceivable that a combination of an established antidepressant agent
such as SJW and an established anxiolytic agent such as kava may effectively treat MDD
presenting with comorbid anxiety. It is possible that a beneficial synergistic effect may
also occur between SJW and kava, improving the treatment outcomes in MDD with comorbid
anxiety, than by the individual substances alone. Determination of this is not addressed in
this study due to limitations of time and resources. The determination of the strength of
the SJW-kava combination will be ascertained by comparing similar trials using SJW and kava
mono-therapy in addressing MDD and GAD.
The hypothesis is that a combination of SJW and kava will reduce MDD occurring with comorbid
anxiety more than placebo.
Status | Completed |
Enrollment | 50 |
Est. completion date | October 2007 |
Est. primary completion date | October 2007 |
Accepts healthy volunteers | No |
Gender | Both |
Age group | 18 Years to 65 Years |
Eligibility |
Inclusion criteria: - Any person male or female aged 18-65 presenting with a diagnosis of unipolar depression confirmed by CIDI auto (quantified by BDI) and an anxiety score on the DASS of 8 or above i.e. the mean (quantified also by BAI) Exclusion criteria: - Psychotic/ Bipolar illness - Current or < 6 month significant suicidal ideation - Diagnosed hepato-biliary disease/inflammation - Current or < 6 month substance abuse disorder including alcohol - Current or < 12 month use of kava, St. John's wort, - Current or < 1 month of synthetic antidepressants or benzodiazepines - Previous reaction to kava or St. John's wort - Medications that maybe pharmacokinetically altered via St. John's wort including: - Amitriptyline anti-coagulants e.g. phenprocoumon, warfarin, - Anti-fugals e.g. voriconazole, - Anti-histamines e.g. fexofenadine, - Benzodiazepines e.g. alprazolam, - Chemotherapeutics e.g. irinotecan, digoxin, HIV medication (anti-retrovirals), * Immunosuppressants e.g. cyclosporine, methadone, OCP, - Statins e.g. simvastatin, warfarin (Henderson 2002; Izzo 2004). - However this interactions are based on case studies and theoretical interactions and are regarded to be induced by hyperforin (a constituent of St. John's wort); low or non-standardised hyperforin preparations are regarded to not induce drug interactions as little induction of P-glycoprotein and CYP P450 enzymes occurs (Madabushi et al. 2006). Although in vitro studies have confirmed that kava and the isolated kavalactones modulate certain CYP 450 enzymes, no documented evidence of human kava-drug pharmacokinetic interactions exists (Mathews, Etheridge & Black 2002; Singh 2005) - Seeing a psychologist or counsellor currently or in the previous month. - Non-English speakers. - Pregnancy |
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Crossover Assignment, Masking: Double-Blind, Primary Purpose: Treatment
Country | Name | City | State |
---|---|---|---|
Australia | RBWH | Brisbane | Queensland |
Lead Sponsor | Collaborator |
---|---|
The University of Queensland |
Australia,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | BDI II | |||
Primary | BAI | |||
Primary | DASS | |||
Secondary | WHOQOL | |||
Secondary | Daily Mood Monitoring Form |
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