I had that situation with my pdoc once, when I had to fill in the BDI (Beck Depression Inventory) weekly. Among other things, it asked about how I slept. I had just started on new sleeping medication and I was sleeping better, but I wasn't sure about how to answer the question - yeah, I wasn't sleeping extremely bad anymore, but that was because of the medication.
Pdoc said: fill them in how it is now, meaning, with medication.

It sort of makes sense: if you're depressed and you score very low (or high, not sure whether high was good or low was good) on the BDI, and then you get medication and you're not depressed anymore, it doesn't make sense to score as though you are, right?

Also - it has been impressed upon me that you should not answer questions the way you always have if you're not still exactly that way - it sort of defeats the purpose of the whole test. Most tests, including the Sanity Score I think, say: "Answer these questions about how you have been the last 2 (or 4, depending on the test) weeks". So no, don't answer the questions thinking about how you were before medication, answer them about how you are now.
The tests are designed to give you a score about how you are doing now. They are not to measure how bad you've been in the past, or how severe your lowest point was.

Take care.