Marijuana works to stop the negative neurological effects and muscle spasms caused by multiple sclerosis. A study published in the Canadian Medical Association suggests that marijuana may ease painful symptoms of multiple sclerosis.
In the journal it was said that the experiments were done on mice, and that marijuana lessened the bruising of the brain, and helped with healing mechanisms after a traumatic injury. 
5. Control Epileptic seizure
Beware, though, higher doses may increase anxiety and make you paranoid.
In the writings, the focus was mainly on its power as a medication for rheumatism, gout, malaria, and funny enough, for absent-mindedness. The importance of medicinal value was focused mainly than the intoxication properties.
However, people who suffer from serious nightmares, especially patients with PTSD, this can be helpful. Nightmares and other dreams occur during those same stages of sleep.
How you take it is up to you. Each method works differently in your body. “If you smoke or vaporize cannabis, you feel the effects very quickly,” Bonn-Miller says. “If you eat it, it takes significantly longer. It can take 1 to 2 hours to experience the effects from edible products.”
Side effects that have been reported include:
Has the FDA approved medical marijuana?
Why hasn’t more research been done? One reason is that the U.S. Drug Enforcement Administration (DEA) considers marijuana a Schedule I drug, the same as heroin, LSD, and ecstasy, and likely to be abused and lacking in medical value. Because of that, researchers need a special license to study it, says Marcel Bonn-Miller, PhD, a substance abuse specialist at the University of Pennsylvania Perelman School of Medicine.
National Conference of State Legislatures: “State Medical Marijuana Laws.”
The agency did, however, agree to support additional research on marijuana and make the process easier for researchers. “Research is critically needed, because we have to be able to advise patients and doctors on the safe and effective use of cannabis,” Bonn-Miller says.
These are just a few of the excellent questions around this subject, questions that I am going to studiously avoid so we can focus on two specific areas: why do patients find it useful, and how can they discuss it with their doctor?
Many patients find themselves in the situation of wanting to learn more about medical marijuana, but feel embarrassed to bring this up with their doctor. This is in part because the medical community has been, as a whole, overly dismissive of this issue. Doctors are now playing catch-up and trying to keep ahead of their patients’ knowledge on this issue. Other patients are already using medical marijuana, but don’t know how to tell their doctors about this for fear of being chided or criticized.
Marijuana without the high
This is not intended to be an inclusive list, but rather to give a brief survey of the types of conditions for which medical marijuana can provide relief. As with all remedies, claims of effectiveness should be critically evaluated and treated with caution.
Patients do, however, report many benefits of CBD, from relieving insomnia, anxiety, spasticity, and pain to treating potentially life-threatening conditions such as epilepsy. One particular form of childhood epilepsy called Dravet syndrome is almost impossible to control but responds dramatically to a CBD-dominant strain of marijuana called Charlotte’s Web. The videos of this are dramatic.
Marijuana is also used to manage nausea and weight loss and can be used to treat glaucoma. A highly promising area of research is its use for PTSD in veterans who are returning from combat zones. Many veterans and their therapists report drastic improvement and clamor for more studies, and for a loosening of governmental restrictions on its study. Medical marijuana is also reported to help patients suffering from pain and wasting syndrome associated with HIV, as well as irritable bowel syndrome and Crohn’s disease.