I stick a needle in my leg three times a day and shoot it with a drug.
One of the shots is a very promising drug for the management of MS that is believed to help modulate the immune system. I believe it is literally helping to keep me alive on this planet. It's one of an exciting whole new generation of medications designed to help people with MS live better lives. Lots of people take this particular drug with no problems at all.
But some people do experience side effects, including mood swings. These hit me in really strange ways. For example, yesterday I was on an airplane and I watched a movie in which the father character dies. This made me cry loudly and uncontrollably in my airplane seat. I started feeling really stupid for crying in public, and then I was really off to the races! This quickly led to my feeling like a total failure, which made me cry even more. I eventually bounced out of it, but it was such a strange feeling.