DepressionNCT00009568
Platelet Function in Patients Treated With SSRI and Non-SSRI Antidepressants
An observational study of Depression, run by National Institutes of Health Clinical Center (CC) at 1 site in United States.
Trial summary
This study will examine the effect of a class of antidepressant medications called selective serotonin reuptake inhibitors (SSRIs) on platelet function. Platelets are small blood cells that help stop bleeding after injury to a blood vessel by forming a clot, or plug, in the vessel. Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Depression
- How many people
- 70 participants
- Where
- 1 siteUnited States
- Study dates
- Jan 2001to Jan 2005
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Who may be able to join
- Male or female subjects with a diagnosis of depression over the age of 18 years,
- Subjects currently prescribed and taking a stable dose of SSRI for at least 6 weeks, or
- Subjects currently prescribed and taking a stable dose of bupropion for at least 6 weeks.
Who cannot join
- Inherited or acquired coagulopathies or platelet disorders
- Abnormal thyroid function (TSH less than 0.42 or greater than 4.4 micro IU/ml and free T4 less than 1.0 or greater than 1.9 ng/dL).
- Severe depression as indicated by the following: Major depressive disorder single episode, severe without psychotic features DSM-IV 296.23; Major depressive disorder single episode, severe with psychotic features DSM-IV 296.24; Major depressive disorder recurrent, severe without psychotic features DSM-IV 296.33; Major depressive disorder recurrent, severe with psychotic features DSM-IV 296.34.
- Patients who are currently receiving coumadin or heparin, non-steroidal antiinflammatory drugs (NSAIDs), acetylsalicylic acid (Aspirin), corticosteroids, chemotherapy, or other medications known to interfere with platelet function studies will not be eligible.
- Patients taking NSAIDS and aspirin or other medications known to interfere with platelet function studies will be eligible if they discontinue these medications for more than 10 days prior to testing.
- Patients who are taking the following psychotropic medications: valproic acid, carbamazepine, buspiron, atypical antipsychotics, or any other psychotropic medications will not be eligible.
Trial locations and contacts
1 site in 1 country.
United States1 site
Warren G. Magnuson Clinical Center (CC)
Bethesda, Maryland, 20892
About this study
Official title: Platelet Dysfunction in Patients Treated With SSRI Versus Non-SSRI Antidepressants
This study will examine the effect of a class of antidepressant medications called selective serotonin reuptake inhibitors (SSRIs) on platelet function. Platelets are small blood cells that help stop bleeding after injury to a blood vessel by forming a clot, or plug, in the vessel. Some medications impair platelet function, leading to increased bruising and bleeding. SSRIs decrease an important platelet component called serotonin, which may cause bleeding in some patients. SSRIs include fluoxetine (Prozac), sertraline (Zoloft), paroxetine (Paxil), fluvoxamine (Luvox) and citalopram (Celexa).
Patients 18 years of age and older being treated for depression with a SSRI or the non-SSRI bupropion (Wellbutrin) may be eligible for this study. Subjects will be recruited from a private clinic in Washington, D.C.
Read more
Participants will provide a history of their current medications and past history of bleeding. They will have about 4 tablespoons of blood drawn for tests to measure blood cell counts and platelet function. The study takes about 1 hour. The results of the SSRI-treated group and the bupropion-treated group will be analyzed and compared.
This study may provide information that will help health care providers make treatment decisions to minimize possible adverse effects of medications in patients with depression.
Read the detailed description
This study will evaluate platelet function in patients during treatment with selective serotonin reuptake inhibitors (SSRIs) which are widely used antidepressant agents. SSRIs, which are known to decrease platelet serotonin content, have been reported to be associated with bleeding in a minority of patients and recently have been associated with an increase in gastrointestinal bleeding. The purpose of this study is to better understand the potential risks of bleeding associated with mild platelet dysfunction in patients using SSRIs and to determine whether a global test of platelet function, as performed on the platelet function analyzer-100, is able to identify the changes in platelet function associated with SSRI use. Until recently, platelet function testing has utilized platelet aggregation studies which are very labor-intensive and require highly skilled technicians; a newer instrument, the Platelet Function Analyzer-100 (PFA-100, Dade Behring, Deerfield, IL) requires much less technical input to evaluate platelet function. The patients will be selected from a private clinic in the Washington, DC, area and will undergo a baseline assessment (history of bleeding and/or thrombosis), blood tests for routine blood counts, chemistries, and platelet function using the PFA-100. The analysis will include a statistical comparison of the platelet function in patients on SSRIs with those on a non-SSRI antidepressant medication (bupropion). It will also include an analysis of the results of the PFA-100 compared to the results of platelet aggregation. The results of the study may provide a better understanding of platelet function and screening for platelet function defects in patients using SSRIs.
- Conditions
- Depression
- Keywords
- Antidepressants, Platelet Function, SSRI, Depression, Bleeding Time
- Medical subject headings
- Depression
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Feb 2001 (estimated)
- Study startJan 2001
- Study completionJan 2005
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (2)Papers the sponsor has linked to this study.
- Other trials for DepressionStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Enrolment
- 70 participants
Sponsor and investigators
- Lead sponsor
- National Institutes of Health Clinical Center (CC)
- Sponsor type
- US National Institutes of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00009568
- Sponsor's protocol ID
- 010077
- Other IDs
- 01-CC-0077
- Status last verified
- Jan 2005
- First submitted
- 1 Feb 2001
- Last updated
- 4 Mar 2008
- Results posted
- No
Publications
Alderman CP, Moritz CK, Ben-Tovim DI. Abnormal platelet aggregation associated with fluoxetine therapy. Ann Pharmacother. 1992 Dec;26(12):1517-9. doi: 10.1177/106002809202601205.
PubMed 1482806Berk M, Jacobson BF, Hurly E. Fluoxetine and hemostatic function: a pilot study. J Clin Psychiatry. 1995 Jan;56(1):14-6.
PubMed 7836333
Study at a glance
From the registry record, last updated by the sponsor on 4 Mar 2008. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Platelet Dysfunction in Patients Treated With SSRI Versus Non-SSRI Antidepressants
- ClinicalTrials.gov ID
- NCT00009568
- Acronym / sponsor ID
- 010077
- Conditions
- Depression
- Keywords
- Antidepressants, Platelet Function, SSRI, Depression, Bleeding Time
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 70 participants
- Lead sponsor
- National Institutes of Health Clinical Center (CC)US National Institutes of Health
- Study start
- Jan 2001
- Study completion
- Jan 2005
- First posted
- 2 Feb 2001 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study will examine the effect of a class of antidepressant medications called selective serotonin reuptake inhibitors (SSRIs) on platelet function. Platelets are small blood cells that help stop bleeding after injury to a blood vessel by forming a clot, or plug, in the vessel. Some medications impair platelet function, leading to increased bruising and bleeding. SSRIs decrease an important platelet component called serotonin, which may cause bleeding in some patients. SSRIs include fluoxetine (Prozac), sertraline (Zoloft), paroxetine (Paxil), fluvoxamine (Luvox) and citalopram (Celexa).
Patients 18 years of age and older being treated for depression with a SSRI or the non-SSRI bupropion (Wellbutrin) may be eligible for this study. Subjects will be recruited from a private clinic in Washington, D.C.
Participants will provide a history of their current medications and past history of bleeding. They will have about 4 tablespoons of blood drawn for tests to measure blood cell counts and platelet function. The study takes about 1 hour. The results of the SSRI-treated group and the bupropion-treated group will be analyzed and compared.
This study may provide information that will help health care providers make treatment decisions to minimize possible adverse effects of medications in patients with depression.
Detailed description
This study will evaluate platelet function in patients during treatment with selective serotonin reuptake inhibitors (SSRIs) which are widely used antidepressant agents. SSRIs, which are known to decrease platelet serotonin content, have been reported to be associated with bleeding in a minority of patients and recently have been associated with an increase in gastrointestinal bleeding. The purpose of this study is to better understand the potential risks of bleeding associated with mild platelet dysfunction in patients using SSRIs and to determine whether a global test of platelet function, as performed on the platelet function analyzer-100, is able to identify the changes in platelet function associated with SSRI use. Until recently, platelet function testing has utilized platelet aggregation studies which are very labor-intensive and require highly skilled technicians; a newer instrument, the Platelet Function Analyzer-100 (PFA-100, Dade Behring, Deerfield, IL) requires much less technical input to evaluate platelet function. The patients will be selected from a private clinic in the Washington, DC, area and will undergo a baseline assessment (history of bleeding and/or thrombosis), blood tests for routine blood counts, chemistries, and platelet function using the PFA-100. The analysis will include a statistical comparison of the platelet function in patients on SSRIs with those on a non-SSRI antidepressant medication (bupropion). It will also include an analysis of the results of the PFA-100 compared to the results of platelet aggregation. The results of the study may provide a better understanding of platelet function and screening for platelet function defects in patients using SSRIs.
Study design
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (3 listed)
- Male or female subjects with a diagnosis of depression over the age of 18 years,
- Subjects currently prescribed and taking a stable dose of SSRI for at least 6 weeks, or
- Subjects currently prescribed and taking a stable dose of bupropion for at least 6 weeks.
Key exclusion criteria (6 listed)
- Inherited or acquired coagulopathies or platelet disorders
- Abnormal thyroid function (TSH less than 0.42 or greater than 4.4 micro IU/ml and free T4 less than 1.0 or greater than 1.9 ng/dL).
- Severe depression as indicated by the following: Major depressive disorder single episode, severe without psychotic features DSM-IV 296.23; Major depressive disorder single episode, severe with psychotic features DSM-IV 296.24; Major depressive disorder recurrent, severe without psychotic features DSM-IV 296.33; Major depressive disorder recurrent, severe with psychotic features DSM-IV 296.34.
- Patients who are currently receiving coumadin or heparin, non-steroidal antiinflammatory drugs (NSAIDs), acetylsalicylic acid (Aspirin), corticosteroids, chemotherapy, or other medications known to interfere with platelet function studies will not be eligible.
- Patients taking NSAIDS and aspirin or other medications known to interfere with platelet function studies will be eligible if they discontinue these medications for more than 10 days prior to testing.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 Mar 2008.
- Background: PubMed 1482806Alderman CP, Moritz CK, Ben-Tovim DI. Abnormal platelet aggregation associated with fluoxetine therapy. Ann Pharmacother. 1992 Dec;26(12):1517-9. doi: 10.1177/106002809202601205.
- Background: PubMed 7836333Berk M, Jacobson BF, Hurly E. Fluoxetine and hemostatic function: a pilot study. J Clin Psychiatry. 1995 Jan;56(1):14-6.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Depression, run by National Institutes of Health Clinical Center (CC) at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 4 Mar 2008. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00009568, which also lists 2 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Mar 2008.