My mom is suffering from Multiple Sclerosis.

Hey, everyone. My mom is suffering from Multiple Sclerosis. Two weeks before she told me that she has blurry vision and colors appear dull. She also added that she has pain inside her eyes. With an addiction to that, she was experiencing numbness in her face and tingling. She was not able to walk and was having emotional changes too. When I discussed this with our family doctor, he told that she is suffering from Multiple Sclerosis. He told that the symptoms can be controlled by taking an appointment from a medical marijuana clinic in British Columbia. I am not much aware of this treatment. Is there anyone who has undergone this treatment? If so it will be great if you can share your views on it! Is there any adverse effect for this medical cannabis? Is there a chance for addiction?