View clinical trials related to Major Depressive Disorder.
Filter by:To compare the antidepressant efficacy and safety of DVS-233 SR with those of placebo in adult outpatients with MDD.
To compare the antidepressant efficacy and safety of DVS-233 SR versus placebo in adult outpatients with MDD.
This study will examine how the brains of depressed people function during learning and respond to feedback. Participants perform a "probabilistic reversal learning task" to determine whether depressed people perform worse on a task than non-depressed people when they sometimes receive misleading negative feedback. Right-handed healthy volunteers, people with major depression who are currently depressed or have previously been depressed and people with bipolar depression between 18 and 50 years of age may be eligible for this study. Candidates are screened with a medical and psychiatric history, physical examination, electrocardiogram, blood and urine tests. They are also interviewed to evaluate mood, sleep, energy, work and school performance, and social relationships, and asked to answer questions to investigate whether any history of paranoia, panic attacks, obsession, compulsions, suicidal thoughts, eating disturbances, and alcohol or drug abuse is present. They complete rating scales for depression, anxiety, and negative thinking; history of alcohol and tobacco use; physical movement; socioeconomic status; overall level of functioning; and depression type. Finally, they undergo a battery of neuropsychological tests to assess general intelligence, handedness, and specific cognitive abilities, including memory and concentration. Participants perform the probabilistic reversal learning task either in a testing room seated in front of a computer or lying down while undergoing functional magnetic resonance imaging (FMRI). FMRI is a diagnostic test that uses a strong magnet and radio waves to obtain pictures of brain structure and function. For the scan, the subject lies on a narrow bed with a plastic-encased metal coil close to the head. The bed slides into the scanner - a small tunnel about 6 feet long. All subjects, whether in the testing room or in the MRI scanner, undergo the learning task as follows: Two patterns are presented on a computer screen. One pattern is designated "correct" and the other "incorrect." Subjects are asked to choose the correct pattern on each try and are provided feedback as to whether the response was right or wrong. Sometimes the rule changes, and the pattern that was correct is now wrong, and vice versa, so that the new correct pattern must be chosen. In addition, misleading feedback is sometimes given intentionally, indicating the subject chose the wrong pattern when in fact the response was correct. Subjects should change their response only when they are sure that the rule has changed, and not because they were incorrectly told that they were wrong. For patients undergoing MRI, blood flow in the different areas of the brain is measured during the test. After the test, outside the scanner, participants undergo additional tests of attention, memory, and concentration like those that were administered during the screening procedures.
Primary Objective: To compare the efficacy and safety of DVS-233 SR versus placebo treatment in reducing the relapse rate of depressive symptoms in subjects with major depressive disorder (MDD), and to compare the percentages of relapse in terms of time to relapse between DVS-233 SR and placebo treatment groups by using survival analysis. Secondary Objective: To assess the response of subjects on DVS-233 SR versus placebo for the clinical global evaluation, functionality, general well-being, pain, and absence of symptoms (Hamilton Psychiatric Rating Scale for Depression, 17-item [HAM-D17] < 7).
Primary Objective: To compare the antidepressant efficacy and safety of subjects receiving DVS-233 SR versus subjects receiving placebo. Secondary Objective: To assess the response of subjects receiving DVS-233 SR for the clinical global evaluation, functionality, general wellbeing, pain, and absence of symptoms (Hamilton Psychiatric Rating Scale for Depression, 17-item [HAM-D17] less than or equal to 7) versus those subjects receiving placebo.
The purpose of this research study is to determine the effectiveness of 2 target doses of R228060 in comparison with placebo during 6 weeks of treatment in moderately to severely depressed adult subjects with major depressive disorder. Approximately 488 subjects will be involved in the study.
To compare the antidepressant efficacy and safety of subjects receiving DVS-233 SR versus subjects receiving placebo.
Primary: To compare the antidepressant efficacy and safety of subjects receiving DVS-233 SR versus subjects receiving placebo. Secondary: To assess the response of subjects receiving DVS-233 SR for the clinical global evaluation, functionality, general well-being, pain, and remission (Hamilton Psychiatric Rating Scale for Depression, 17-item [HAM-D<sub>17</sub>] < 7) versus those subjects receiving placebo.
This study will use magnetic resonance imaging (MRI) to examine how the brain regulates emotions in healthy people and in patients who have major depression and anhedonia (loss of feeling of pleasure in things that normally give pleasure). Healthy normal volunteers and patients between 18 and 50 years of age with major depression, with or without significant anhedonia, are eligible for this study. Candidates will be screened with a psychiatric interview, a physical examination that will include blood and urine samples, and an electrocardiogram, and a questionnaire about their emotions. Participants will perform a monetary reward task while lying in an MRI scanner. The task is similar to playing a computer video game with the possibility of winning cash. The amount of cash is largely dependent on the subject's performance. The accumulated amount of cash earned in a session will fluctuate depending on the subject's continuing performance level. That is, during a single session, a subject could lose money earned early in the session if his or her performance later in the session is not as good as earlier. MRI pictures will be taken during performance of the task. MRI uses a magnetic field and radio waves to produce images of body tissues and organs. The patient lies on a table that is moved into the scanner (a narrow cylinder) and wears earplugs to muffle loud knocking and thumping sounds that occur during the scanning process. The procedure will last about 1 to 1-1/2 hours.
A study to obtain safety and tolerability data