Klonopin
"Several years ago my life long difficulties with startles escalated to classic hyperekplexia.  After some research, my suggestions to both a geriatric psychiatrist and movement disorder specialist agreed to try Klonopin ... .5 mg twice/day.  Worked fine to decrease intensity and frequency of "attacks."  I also have dystonia and as the cervical "storms" increased, they increased Klonopin to .5 three times a day.  Helped some but does not extinguish the disorders ... nothing will.  One just has to avoid the "triggers," if possible."