Is 50mg a day too much for just starting accurate? I weigh around 115 Ibs.

You should do very well on 50mg daily if that is what your dermatologist suggested.  I start all my patients on 40-80mg daily (the 40mg tablets tend to be cheaper than the 20 or 30mg ones), and if they are very severe, we try the 80mg right away.  Over the years, several studies have concluded that a higher dose sooner, and an overall higher dose, if well tolerated, is more effective in the long run than going too slow and risking having to repeat the entire course.  You definitely can ask your dermatologist about decreasing the dose if you like, but I would encourage you to try and stick with the 50mg.  Hope you love your results and hang in there!