Multiple Sclerosis Clinical Trial
Official title:
Efficacy of Cannabinoids to the Current Standard Treatments on Symptom Relief in Persons With Multiple Sclerosis: Randomized Controlled Trial
Multiple sclerosis (MS) is an inflammatory disease of the central nervous system (CNS) afflicting over 77,000 Canadians. Unfortunately, the therapeutic arsenal to relieve MS symptoms is limited. It is therefore essential to develop better approaches to treat the symptoms of MS. The use of cannabis for recreational purposes is now legal in Canada. However, for many years, people with Multiple Sclerosis (PwMS) have used cannabis either to relax, to reduce pain and spasticity, or to improve sleep and daily functioning. Currently, there is little scientifically established evidence that cannabis works on these symptoms in people with MS. It is therefore important to carry out studies to better understand the efficacy Δ-9-tetrahydrocannabinol (THC), and cannabidiol (CBD) on MS symptoms . THC is known for its analgesic, neuroprotective and anti-inflammatory properties and CBD seems to have positive effects on anxiety and cognitive abilities (memory, concentration). For this study, investigators hypothesize that administering different doses of THC alone, CBD alone, and THC and CBD combined will result in a significant beneficial effect on spasticity relief compared to placebo.
The aim of this study is to document, 1. The efficacy of THC and CBD, alone and in combination, as add-on therapies to the current standard treatments for relief of spasticity and other symptoms in PwMS (muscle spasms and stiffness); 2. Assess the tolerability profile of THC and CBD, alone and in combination, when used in PwMS; 3. Identify the mechanisms underlying such therapeutic and adverse effects of different types of cannabis-based medicines in PwMS, Participants will initially receive THC 4mg/day or CBD 40mg/day or THC/CBD combination (THC 4mg and CBD 40mg/day), or placebo, on the first day. Dose will be increased up to 20mg (THC) and 200mg (CBD) per day, if well tolerated. Participants will receive the allocated treatment for a total of 4 weeks, followed by an additional 12 weeks of treatment for responders who will be identified as patients who had a decrease from baseline in spasticity of at least one point on the Numerical Rating Scale . THC and CBD will be taken as oil softgels in two divided doses per day. Cannabis extract and placebo will taste and look exactly the same. To protect from all contingencies and to minimize the risk of adverse reactions, the presence of adverse events will be evaluated at each research visit, as well as through courtesy calls between visits. If any mental or physical symptoms occur that require medical attention, the PwMS will be referred as required to an attending neurologist, psychiatrist, or other specialists . ;
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