MS is a disease that attacks your brain, spinal cord, and nerves. Medical marijuana has dozens of chemicals that can affect your mind and body. An estimated 350,000 people in the United States are living with multiple sclerosis (MS), a painful, debilitating, and sometimes fatal disorder of the central nervous system. MS is the most common debilitating neurological disease of young people, appearing between the ages of 20 and 40, and affecting more women than men Multiple sclerosis is a progressive disease that eventually causes nerve damage and deterioration. In people with MS, the immune system is overactive and causes damage to cells in the brain, spinal cord, or optic nerves that make up the central nervous system. People with damage to nerves and their brain often develop muscle spasticity, a condition that causes stiff muscles that feel tight and resist stretching. Muscle spasticity eventually causes severe discomfort, pain, and sometimes deformity. Evidence suggests that marijuana or its active compounds, called cannabinoids, may ease sleep problems in THOSE with MS, fibromyalgia, and certain other medical conditions. While cannabinoids have been studied for a variety of neurologic disorders, there is strong evidence to indicate the benefits of treatment of spasticity and neuropathic pain in multiple sclerosis. The best dose for an individual remains uncertain, most participants in the studies discussed in this paper used between 20 and 40 mg of THC a day in divided doses. Serious adverse events were rare and cannabis products were generally well-tolerated. Cannabis use does appear to be associated with an increased risk of certain adverse events, including psychosis, cardiovascular diseases, and cannabinoid hyperemesis syndrome in certain high risk individuals. Therefore a medical evaluation is necessary prior to treating MS with Medical Marijuana.