Interesting indeed, Lee, thanks for the info.
I've concluded that Amitriptyline whilst great is just papering over a crack of some kind.
I'm going to go back to running 5km every two days and I may try a diuretic that was prescribed a while back to see if I can reduce my pressure and frequency of vertigo.
I'm going to continue to keep away from alcohol and caffeine.
I've just done a big search of natural diuretics and i'm going to try to ensure a lot of these things are included in my diet.