Actually I have read that severe mood swings from Laughing hysterically to crying hysterically is one of the symptoms... I experienced this plenty... I also have PTSD... but believe it was the MS after reading that it was part of the symptoms... here is a link to read more about The Pseudobublar Affect. as related to MS
https://www.google.com/url?sa=t&rct=j&q...

I had that occur to me a few times... very scary... its like you have no reason to be hysterical to the extremes... I also have Post Traumatic Stress Disorder, so I never know what causes what, I have Fibromyalgia as well as degenerative disc disease in my lower lumber ( only on 2 of the 5 discs in my lower lumbar and my cervical (neck) in real bad on the left side.. always in pain, take way to much meds.. all necessary.. wish I had the energy to do what I use to without being in pain with the first 10 minutes... needing to relax in a recliner and still be hurting.

Yes, I have PBA and only have the sobbing. I take nuedexta and it's better than it was, but would be mush happier if I could get rid of it.

I have PBA and I am on Nudexta for it. That has been a life savor for me. I had the crying all time for no reason and crying uncontrollable all the time. I also see a counselor that specializes in MS and that has helped me so much as well. But really look into Nudexta! It is a miracle worker!!!!

Yes, and that is why my former physician put me on Cymbalta, for mood swings and for my nerve pain. I had a meltdown in his office one day, started crying hard for no real reason. Sometimes I still have crying jags or anger outbursts, but for the most part the Cymbalta works well.