I'm not on any meds but if yours are the kind that force the pancreas to produce more insulin then
you will need to keep a very close eye on how your blood sugar is responding to the diet.
As to protein - how much is too much is a matter of
much debate in the low carb community but all agree that too little is no good for you. I personally find I can eat quite a bit of protein (I find it more satiating than fat) without it negatively impacting my weight or my blood glucose but a good starting point would be 1 gram of protein per kilo of reasonable ideal body weight. You can always adjust levels depending on how your blood glucose/body weight reacts.
Hopefully someone with more knowledge of your meds will spot this post & be able to add to it