Please make sure you are not grasping at straws.

IAA and infection (ie. needs a dental) can also cause a need for higher doses. Cabergoline will do nothing for that.
I also think you need to reread this thread, especially post #31 by JL.
07/19 Eddie Cabergoline question
For some cats, cabergoline impacts hard and fast. I've seen cat's including Melissa's have a pretty scary ride own the dosing scale. Marvin was amazing and a very hairy time for Nat, given she had to work too. Check out
his SS, starting 6/23/2017. See how much she tested, could you do that too to keep Eddie safe? Note almost no two cats are alike on how they react to cabergoline, so don't set any expectations should you go this route. Especially given how unique Eddie is in treatments.