I was started on 0.9. a few years ago. Until I discovered this forum I knew nothing of 3% and 7%. I was never aware of any therapeutic response to 0.9%. When I became enlightened and got doc to Rx 7% the response was dramatic, unmistakable. Don't know about 3% but If I were you, knowing what I now know, I'd be tempted to try 7% if your doc is amenable. Good luck, Don