32 Clinical Trials for Various Conditions
The purpose of this study is to assess the efficacy and safety of tirzepatide in adults with obesity and binge-eating disorder, comparing tirzepatide against placebo and lisdexamfetamine dimesylate. All participants will receive guided self-help cognitive behavioral therapy.
This study is being conducted to evaluate how the body absorbs and processes the medication lisdexamfetamine (Vyvanse®). Subjects who are 9-15 months post gastric bypass surgery will be invited to participate. Non-surgical controls will also be enrolled based on a matching criteria to post gastric bypass subjects. Participants will be asked to complete one 12-hour study day and complete one 24-hour post dosing blood draw.
The purpose of this study is to identify the effects of lisdexamfetamine (LDX) on the neural and behavioral subcomponents of self-control, that is cognitive control and reward functioning, in adolescents and young adults with attention-deficit/hyperactivity disorder. The investigators hypothesize that LDX is associated with 1a) decreased task-independent locus coeruleus (LC) activity; 1b) increased task-related activity in LC and the cognitive control network; 2) increased LC connectivity with the cognitive control network and 3) improved task performance and self-control. The investigators will test their hypotheses on fMRI data with linear contrasts of voxel-wise maps of parameter estimates (in both univariate and connectivity analyses). The investigators will also assess change in brain activity with the LDX in the LC and ventral tegmental areas (VTA) as we hypothesize that they are altered in ADHD and related to cognitive control and self-control dysfunction in ADHD. The investigators will use a repeated-measures, between-subject design to compare the effects of oral once daily LDX in a double-blind placebo-controlled randomized trial (RCT) on neural (fMRI) and behavioral correlates of cognitive control via a working memory and a reward - delay discounting task in adolescents and young adults. A new condition has been added which will use a within-subject comparison, cross-over design between a single dose of LDX versus a single dose of placebo.
The purpose of this study is to evaluate ideal dose or lisdexamfetamine and tolerability, plus reduction in cocaine use and craving.
The proposed protocol is an open-label pilot study of the treatment of cocaine dependence using lisdexamfetamine (LDX), a prodrug of d-amphetamine. The investigators plan to enroll 12 patients in an eight-week open-label trial to obtain preliminary data regarding the safety, tolerability, and potential utility of lisdexamfetamine for treatment of cocaine dependence and to determine an effective dosage range.
There have been reports that stimulants may be effective for bipolar depression without triggering mania. This study will examine whether lisdexamfetamine can improve depressive symptoms over the course of eight weeks. Lisdexamfetamine is a prodrug stimulant that is currently approved for attention deficit hyperactivity disorder (ADHD). Participants take the study drug or placebo in addition to a mood stabilizer. The study includes functional magnetic resonance imaging and magnetic resonance spectroscopy to determine whether the medication alters the response to affective stimuli or glutamate, glutamine, or gamma aminobutyric acid (GABA) levels. Neuropsychological testing is also included to determine whether the study drug improves memory and attention in this population. The primary hypothesis is that lisdexamfetamine is clinically effective in this population. The secondary hypothesis is that it will result in an increased response to affective stimuli and altered neurotransmitter levels in the anterior cingulate cortex.
This protocol is a 2-group double-blind placebo-controlled outpatient study investigating lisdexamfetamine for treatment of cocaine dependence. The investigators plan to enroll 100 subjects in a 14-week trial. The primary objectives will determine changes in cocaine use and secondary objectives will be cocaine craving and impulsivity.
The purpose of this research study is to learn about the effects of a medication called Vyvanse on the heart (cardiovascular system). The U.S. Food and Drug Administration (FDA) has approved Vyvanse for the treatment of Attention Deficit Hyperactivity Disorder (ADHD). People who have ADHD have trouble paying attention, organizing, and planning; these symptoms can cause problems at work, socially and at home. Vyvanse (also known as Lisdexamfetamine) is a stimulant class medication. There have been reports of serious cardiovascular effects in children and adults treated with stimulants. While there is no definite evidence that these events were related to the use of stimulants, the deaths have raised questions about the cardiovascular safety of stimulants. The study will involve in-depth cardiovascular tests, namely echocardiograph (ultrasound of the heart) and cardiopulmonary exercise test (also called stress test; subjects exercise on a bicycle while measuring their heart activity and breathing is monitored by cardiologists). The investigators predict to see changes in blood pressure and heart rate as shown in previous clinical studies, and that the in-depth cardiovascular tests will provide new insights into the cardiovascular impact of stimulants.
The purpose of this study is to estimate the observed incidence of the health outcomes (suicide attempt or ideation, suicide ideation, suicide attempt, psychosis, and substance abuse) in a cohort of participants diagnosed with attention deficit hyperactivity disorder (ADHD) who are first-line new therapy with methylphenidate monotherapy, lisdexamfetamine monotherapy, atomoxetine monotherapy, amphetamine/dextroamphetamine combo therapy, and either methylphenidate/lisdexamfetamine/atomoxetine monotherapy or amphetamine/dextroamphetamine combo therapy during the 'on treatment' period from 7 days after the start of exposure through the end of exposure (treatment discontinuation for at least 60 days) and the 'intent to treat' period from 7 days after start of treatment to end of continuous observation; and to compare the hazards of outcomes (suicide attempt or ideation, suicide ideation, suicide attempt, psychosis, and substance abuse) in the target cohort (participants diagnosed with ADHD who are first-line monotherapy new users of methylphenidate) versus each comparator cohort (patients diagnosed with ADHD who are first-line newly exposed to lisdexamfetamine monotherapy, atomoxetine monotherapy, amphetamine/dextroamphetamine combo therapy) during the 'on treatment' period from 7 days after the start of exposure through the end of exposure (treatment discontinuation for at least 60 days) and the 'intent to treat' period from 7 days after start of treatment to end of continuous observation.
There has been little research on the third area of impairment noted in the Diagnostic and Statistical Manual of Mental Disorders - "occupational functioning." Individuals with ADHD experience job-related impairments including a greater likelihood of being unemployed and not enrolled in school and for those that were employed they were in a lower status occupation, relative to typically-developing comparison peers. The current literature on analogue workplace settings and the effects of lisdexamfetamine dimesylate includes office-based tasks similar to school seat work. Unfortunately, this is inconsistent with the typical work environment most common for individuals with disabilities such as ADHD where food preparation is the most common job following high school. Therefore, medication effects in this type of setting, most common for individuals with ADHD entering the workforce, need to be studied. The investigators propose to study workplace behavior in an analogue work setting in a laboratory "pizza place." Individuals with ADHD will participate in an interview with a supervisor each day, have a list of deliveries that need to be managed, deal with situations that require occupational judgment and appropriate customer service, and drive to make deliveries accurately and on-time. These behaviors can be reliably assessed within the laboratory. Twenty young adults will participate in two "workdays" within a randomized, double-blind, placebo-controlled design wherein participants will be administered placebo and .3 mg/kg lisdexamfetamine dimesylate in a counter-balanced order.
The purpose of this study is to explore the effect of Lisdexamfetamine on Prefrontal Brain Dysfunction in Binge Eating Disorder
The primary purpose of this study is to test the efficacy of Lisdexamfetamine in Adults With Attention Deficit Hyperactivity Disorder (ADHD) and Sluggish Cognitive Tempo (SCT). This is a placebo controlled, cross-over clinical trial of oral Lisdexamfetamine Dimesylate 30-70mg/day in adults with attention-deficit hyper-activity disorder and Sluggish Cognitive Tempo (ACT). Patients will be assigned either LDX/Placebo for 10 weeks with a two week placebo washout period.
The purpose of this randomized, double-blind, crossover study is to compare two long-acting stimulant formulations-once-daily PRC-063 and once-daily lisdexamfetamine (LDX)-through a 15-hour period on driving performance, as measured with a driving simulator, in adult patients with ADHD.
Methamphetamine dependence is a serious public health problem, with methamphetamine abusers being at risk for significant morbidity and mortality, including HIV. To date, no medication or psychotherapeutic strategy has shown robust, long-term efficacy in treating this disorder. This clinical trial will examine whether lisdexamfetamine shows promise in alleviating withdrawal symptoms and preventing relapse relative to placebo in recently-abstinent methamphetamine dependent individuals. Findings of this study will not only shed light on whether lisdexamfetamine may improve upon treatment for this disorder but also inform future medication development strategies for improving treatment for drug dependence disorders. Discovering efficacious limited risk interventions that show more robust, longer-term outcomes would be beneficial both to the individual and society.
Amphetamines have been shown to improve cognition but its use is limited due to its side effects. Lisdexamfetamine is an amphetamine pro-drug, minimizing these effects and has been safely used in children and adults with Attention Deficit Hyperactivity Disorder (ADHD). The investigators hypothesize that lisdexamfetamine may improve cognitive abilities in MS patients with documented cognitive dysfunction. Because lisdexamfetamine is a stimulant its positive effects should be observed primarily in the domains of processing speed and working memory. The investigators therefore propose a study in which the primary objective will be to assess the efficacy of lisdexamfetamine in improving attention and processing speed in MS. The secondary objectives will be (a) the assessment of the safety and tolerability of lisdexamfetamine in the MS population, and (b) to test for effects of the drug on other cognitive domains, depression, and self and informant reports of cognitive and executive function demanding activities and behaviors.
This study aims to test the effect of a newly-approved stimulant medication, lisdexamfetamine dimesylate (Vyvanse), on specific residual symptoms of depression found in some patients who are undergoing treatment with, but have only partially responded to, a selective-serotonin reuptake inhibitor (SSRI) or selective-norepinephrine reuptake inhibitor (SNRI) antidepressant. Specifically, the investigators hypothesize that symptoms potentially related to deficient dopaminergic activity, such as lassitude, apathy, reduced positive affect and impaired executive function, in particular, will improve. This protocol is designed to test the hypothesis that this cluster of co-occurring residual symptoms sometimes found in treated depression will respond as a group to adjunctive psychostimulant therapy. The investigators propose to demonstrate this cluster of residual depressive symptoms and to measure the effect of stimulant therapy on it. The investigators hope to better understand the specific symptoms in this clinical population that are likely to improve with stimulant therapy.
The specific aim of this study is to evaluate the efficacy and tolerability of lisdexamfetamine in the adjunctive treatment of bipolar disorder.
This study will evaluate how long it takes for ADHD symptoms to improve in subjects who are judged by the Investigator to have had an inadequate response to methylphenidate therapy. The study will also test the safety of Lisdexamfetamine Dimesylate and how well it works.
The specific aim of this study is to evaluate the efficacy and tolerability of a stimulant (lisdexamfetamine) in the adjunctive treatment of bipolar disorder.
The specific aim of this study is to examine the efficacy and safety of lisdexamfetamine compared with placebo in outpatients with binge eating disorder
Over the past decade, the Rochester Center for Behavioral Medicine (RCBM) has evaluated many patients with attention deficit hyperactivity disorder (ADHD). A recurrent finding in these patients is a history of unexplained fatigue and musculoskeletal pain. Treatment of these patients in our clinic has revealed that when their underlying ADHD is treated with psychostimulant medication, many patients report significant improvements with regard to their fatigue and musculoskeletal pain. Patients report less subjective fatigue and pain and note overall functional improvement, although the initial and primary objective was the treatment of their attention or hyperactivity problems. We speculate that stimulants are efficacious by offering two distinct clinical properties. 1) anti-fatigue properties and 2) properties that allow patients to filter out extraneous stimuli (i.e. chronic muscle pain).
The purpose of this study is to examine the effectiveness and length of effect of Vyvanse on lessening Attention-Deficit/Hyperactivity Disorder symptoms in adults. The study will also investigate the safety and tolerability of Vyvanse in adults with ADHD.
To evaluate the sensitivity and responsiveness of a standardized, validated, computer-based, battery of neuro-psychometric tests in adults with ADHD.
The study will evaluate the efficacy of LDX treatment group compared to placebo on the change from Baseline ADHD-RS-IV score at endpoint.
To evaluate the efficacy of LDX compared to placebo in adults with ADHD in the adult workplace environment (AWE) setting
The primary objective of this study is to assess the time of onset of Vyvanse compared to placebo, in the analog classroom as measured by the Swanson, Kotkin, Agler, M. Flynn and Pelham (SKAMP) deportment scale in children (aged 6-12) diagnosed with Attention-Deficit/Hyperactivity Disorder (ADHD).
Assess the efficacy \& tolerability of Vyvanse when children aged 6-12 years diagnosed with ADHD are dosed to optimal effect.
Children with Attention-Deficit/Hyperactivity Disorder (ADHD) are typically treated with two types of medications with differing mechanisms of action: stimulants and non-stimulants. The stimulant Vyvanse (lisdexamfetamine, LDX), and the non-stimulant Intuniv (extended-release guanfacine, GXR), are both FDA approved treatment for ADHD. Clinical trials have shown that both medications are effective in reducing ADHD symptoms, although the neurobiological mechanisms by which Vyvanse and Intuniv produce these effects remain unknown. The aim of this study is to examine the mechanisms by which LDX and GXR reduce symptoms in patients with ADHD. MRI scanning will be used to identify treatment-related changes in brain structure and function.
This project will characterize children and adolescents with severe mood dysregulation (SMD) and conduct a pilot study of combination pharmacotherapy as a basis for future intervention trials. Eligible participants assessed for SMD will have 4 weeks open titration with lisdexamfetamine (LDX) to optimal dose, followed by double-blind randomization to fluoxetine (N=25) or placebo (N=25) in combination with optimized LDX for an additional 8 weeks. Participants will be monitored for clinical response and adverse events. Specific aims are: #1: To define youth meeting SMD criteria in terms of psychiatric comorbidity, neurocognitive functioning, and a potential "bio-signature" derived from electroencephalography (EEG). Specific hypotheses to be tested include: 1) that SMD participants will differ in comparison to non-SMD individuals in our pre-existing database on patterns of a) psychiatric comorbidity, b) symptoms, c) behavioral ratings, and d) neurocognitive functioning, and 2) that a distinct EEG bio-signature will be confirmed in individuals formally diagnosed with SMD. #2: To conduct a preliminary study of sequential pharmacotherapy for SMD with a stimulant followed by randomized, placebo-controlled selective serotonin re-uptake inhibitor (SSRI) therapy to evaluate the feasibility of recruitment and enrollment and assess the suitability of the proposed combination treatment as a basis for future clinical investigations. Specific hypotheses to be tested include: 1) that significant improvement in Clinical Global Impression - Improvement -SMD (CGI-I-SMD) scores and other secondary measures are evident after open-label LDX titration; 2) that participants randomized to fluoxetine will demonstrate additional significant improvement in CGI-I-SMD scores and other secondary measures in comparison to participants randomized to placebo; 3) that combination LDX and SSRI therapy is safe and well tolerated, and 4) that EEG profiles will normalize with treatment.
The primary objective of the study is to assess the benefice of Vyvanse on the factors that cause impairments in driving behavior in individuals with ADHD using a driving simulation aimed at examining the factors that cause impairments in driving behavior in individuals with ADHD such as driving speed, collision risk, and visual attention of 60 young drivers (ages 18-24) with ADHD. We hypothesize: 1.) young adults with ADHD treated with Vyvanse will show lower velocity (speed) scores and spend less time driving over the posted speed limit in the driving simulation when compared to subjects taking a placebo; 2.) young adults with ADHD treated with Vyvanse will show a lesser likelihood to collide with a suddenly appearing peripheral object, less difficulty maintaining the vehicle within their lane, and a lesser likelihood of driving through stop signs and solid red traffic lights without slowing down when compared to subjects taking a placebo; and 3.) young adults with ADHD treated with Vyvanse will exhibit more focused visual attention on details in the visual field when compared to subjects taking a placebo while driving. In addition, young adults with ADHD treated with Vyvanse will exhibit less visual tunneling and shorter off-road glances when compared to subjects taking a placebo.