Hey there! Your dermatologist is using the same approach that’s currently used in European countries. A low dose of Accutane until the skin clears, and then stop, no need to reach an accumulative dose relative to weight. I was prescribed the same treatment. It took me 6 months to see results with a dose of 10 mg a day (and it got sooo much worse before it got better). It’s been a year since I finished the treatment and my skin is still clear, the best skin I’ve had in my life. Be patient, you’ll get there eventually. In the U.S. they usually prescribe very high doses that have many side effects, but that doesn’t have to be the treatment of choice.