I was prescribed Propranolol in 2002 - 80mg at night for 3 weeks dropped down to 40mg - in order to control the morning anxiety surges. In May this year I dropped the dose to 40mg due to dull headaches which lasted all day. However: background anxiety began then panic attacks, silly me; didn't associate it with the drop of dose as there was a lot going on through the months which I could blame for the anxiety.
I have taken antidepressant medication since 1988 and have NEVER heard of ADs being used 'as necessary'. All those I have been prescribed have needed to be taken daily in order to build up support for the brain.
Valium, Ativan etc. can be taken 'as necessary' as prescribed. Not to be relied upon for long-term use.
Have you thought of Rescue Remedy, it has worked for me. Silly me [again], I forgot this year to use it
- found some today and have put it where I can see it! in case.