So, my family has a history of being obese. Ya...gross. I am trying to stop the horrible trend. My doctor put me on this appetite surpressor called Phentermine 37.5. He said that I would lose up to 10 lbs a month...need to lose about 70 lbs. Will this amount of weight being lost each month cause my skin to sag? I am 21 years old and I don't think that I am really old enough to have lost THAT much elastisity in my skin. But I would like to know some opinions from others.....Please be nice