anxiety
"I have been taking this medication for about 5 years on and off since my husband passed away suddenly.  It works very well for me no side effects I take it as needed only.  It's prescribed 0.25 2 x a day as needed.  I take half of that whenever I get anxious and feel my heart racing it stops it right away if I find myself anxious at night I take the other half.  I go days without it as well.  The trick is not to use it all the time.  Just knowing I have it helps me relax in case I should need it.  All meds are addicting if taken all the time."