I started at 5mg, increased to 10mg after a few months, and now on 15mg which is apparently the highest dose currently approved. I was told that if the gradient did not come down within 4 months, it wouldn't work. I asked to try the increased dose of 10mg and the gradient came down slightly. Much bigger drop in gradient on the 15 mg.
I did the pharmacogenetic test (through a private provider) which showed I am a rapid metabolizer of camzyos.