I just came off of antibiotics for a ear infection. and it didnot have any rise in my blood levels

The infection itself can cause high sugar numbers

Yes it Could be you need to cut back on your Sugar till you are off that Med.

I get celullites in my legs alot and have to be on high doses of i.v antbiotics it doesn't raise my levels it lowers them and I scare the dr's and nurses at times. So they have orange juice and that big emergency sugar kit handy in my always. I've dropped to almost to 39. Scary thing to happen and not remembering everything that happened.

I had antibiotics for a leg infection for 2 weeks and my BS shot up from 5.9 to 7.9