Grocery List Time Out:Tell me more about this "Nervine"

It's been another Looooong day of matching and editing grocery lists - and now's about the time when I go looking for something to get my eyes to focus.  It's my "time out", and I like to share, so here's what I found today.  I must say, I'm interested:

"When you are restless, sleepless, nervous, try Dr. Miles Nervine.  Your money back if it fails to relieve you.  At your drug store.  Small package 25¢. Large Package $1.00."

I believe I'll take the LARGE package.