Clonazepam
"I have taken this medicine for at least 15 years now.
I started having panic attacks in my 20s and found out I had mitral valve prolapse,  which can cause a person to be more likely to have panic attacks. For years I took 0.5 mg
at bedtime, now take 0.75 mg. In addition to 25 mg. Lexapro once in the evening. Haven't had a panic attack in years.
This is a great drug, but it is hard for me to get up in the morning sometimes. I'll take that over panic attacks any day, though."