Clinical Trials in Progress

Purpose of the Study: Pain is a common co-morbidity for HIV-positive patients. Prevalence studies suggest that, on average, half of all HIV-positive persons suffer pain. Chronic pain can lead to heavy alcohol use among HIV-positive persons, which may in turn be a barrier to treatment/control of HIV and contribute to spread of HIV. Thus there is an urgent need to address pain among persons with HIV. It is timely and relevant to conduct research on gabapentin, as it has emerged as one of the most commonly prescribed non-opioid medications for pain despite the fact that gabapentin is only FDA approved for "post-herpetic neuralgia" and the literature to support its use for generalized chronic pain is limited. And yet, gabapentin has demonstrated benefits for treatment of alcohol use disorder, and therefore, like naltrexone, it could have a specific role for treating patients with chronic pain and unhealthy alcohol use. This study is a 3-arm pilot, randomized, double-blinded, placebo-controlled study of low-dose naltrexone and gabapentin vs. placebo among HIV-positive persons with heavy alcohol use and chronic pain to provide estimates of their effects on 1) pain (both self-reported and experimental/cold pressor test; 2) inflammation (i.e., levels of inflammatory cytokines IL-6 and TNF-α); and 3) measures of HIV control (CD4 count and viral load).

Purpose of the Study: The purpose of this study is to determine if the addition of Low Dose Naltrexone to standard endometriosis treatments will improve patient reported endometriosis associated pain. The central hypothesis of the research study is that low dose naltrexone (LDN), in combination with hormonal suppression of endometriosis (standard of care), will lead to significant improvement of endometriosis-related pain. The proposal seeks to: 1) determine if the addition of LDN to standard endometriosis treatments will improve patient- reported endometriosis associated pain using daily Visual Analogue Scale (VAS) scores and 2) measure the impact of treatment on quality of life as measured by validated questionnaires including the Endometriosis Health Profile-30 (EHP30) and the Patient's Global Impression of Change (PGIC). The study involves a 12-week intervention period of 4.5 mg daily naltrexone (or placebo) in combination with standard treatment of 5 mg daily norethindrone acetate, and the use of scales to rate daily pain and quality of life.

Purpose of the Study: Naltrexone is an FDA approved drug (for alcoholism) that has found widespread use "off-label" to treat pain and improve quality of life at much lower doses than are used for the approved indication. There are a few scientific studies in three conditions (fibromyalgia, Crohn's disease, and multiple sclerosis) that suggest that this drug has benefit and is safe. However, considering the extent of use in other conditions, and uncertainty about the mechanism of action study is needed in a diverse set of diseases, including vasculitis. The purpose of this clinical trial is to determine if low dose naltrexone is effective in improving health-related quality of life (HRQoL) among patients with vasculitis.

Purpose of the Study: The purpose of this study is to investigate low-dose naltrexone for the treatment of new daily persistent headache (NDPH) in adolescents ages 10-17. New daily persistent headache (NDPH) is a primary headache disorder with a reported prevalence of 3.5% in adolescents. Patients with NDPH have compromised academic performance, school absence, anxiety, depressed mood, sleep impairment, family disruption, and high health care costs. Little is known about which medications effectively manage and treat NDPH. One proposed medication that may benefit children and adolescents with NDPH is low-dose naltrexone. Naltrexone is an anti-inflammatory agent, similar to the opioid antagonist naloxone. Naltrexone is an effective treatment for opioid addiction, however, it was recently discovered that when taken in low doses (1/10 of the typical dose) naltrexone is capable of reducing the severity of chronic pain symptoms. By acting on glial cells in the nervous system as well as other receptors in the brain, naltrexone is capable of exerting analgesic effects. With this analgesic property, it has been speculated that low-dose naltrexone may be an effective treatment for the management of several chronic pain conditions, including headache.Although more research must be conducted to evaluate long-term effects of using low-dose naltrexone, prior studies show that there are little short-term consequences associated with using this drug as a form of treatment for chronic pain symptoms. Investigators aim to assess the efficacy and safety of low-dose naltrexone in the treatment of patients with NDPH. Adolescents ages 10-17 will be recruited from Boston Children's Hospital Pediatric Headache Program.

Purpose of the Study: Over 100 million Americans report chronic pain. Veterans are disproportionately affected for multiple reasons, including injuries and post-traumatic stress disorder. Treatment for chronic pain is a priority research area for the VA. One of the most common causes of chronic pain is osteoarthritis (OA). OA is attributable to "wear and tear," but reasons for pain are complex. Inflammatory arthritis (IA) includes multiple severe diseases that affect 2-3% of persons and require treatment with immune-suppressive drugs to prevent joint destruction. Pain often persists despite effective treatment. Pain in arthritis results from multiple sources: inflammation, perception of pain in the joint, and interpretation of pain by the brain. Unfortunately, management of pain in arthritis remains a challenge. Low dose naltrexone is a widely used but unproven "alternative" approach to chronic pain. It is attractive for study because it is safe and is proposed to work on all three pathways that contribute to pain. A small but high-quality clinical trial is needed to determine whether to invest in definitive studies.

Purpose of the Study: This study evaluates the effect and mechanism of low dose naltrexone for treatment of pain in patients with fibromyalgia. It s a randomised, double-blinded, placebo-controlled, cross-over study.

Purpose of the Study: The investigators are testing treatment with low-dose Naltrexone (LDN) for symptom relief of complex regional pain syndrome (CRPS). Study participants will be randomly assigned to receive either LDN (4.5 mg once daily) or placebo for a period of several weeks. During this period participants will be asked to come to several visits, which will include sensory testing, physical assessments, and questionnaires.