Buspar gives me the Munchies real bad too!!!
Have you tried Lorazapam?
Ambien and me did not get along at all. I would zonk out but if I woke up to use the bathroom I could Not get back to sleep to save my life.
Benadryl works too but I wouldn't recommend it with the HB>
I have the same thing a steady 121 bpm with no explanation. I am on Buspar and Beta Blockers.
Valume helps as well but you need the ten mg not the 5