If you have tried everything you now have to talk to your doctor about stopping the medication...
Reduce or stop the drug.
I had that and it drove me nuts.
I think there may be meds to counter that as a side-effect.
If nothing else works try exercise. Keeping active seems to help.
I'm not sure of the treatment protocol for akathesia so you will need to wait for others input. Hopefully the doctor will be able to offer good, practical advice.
You should probably discuss this with your own doctor too.
Good luck!