<human>: Can you condense the text into a few key points?

I am friends with Dakota on MyFitnessPal and we usually compare food diaries to see if someone made something we want to eat. We also exchange recipes and cook for one another. 

Dakota has been trying to lose weight for about 3 years now and it doesn't work. Her doctor prescribed her a medication that causes weight loss for another issue she has (focus and energy.) She is a lot happier now, but I am concerned she isn't eating enough while on the medication. 

The doctor told her to make a schedule for meals, because she would forget to eat if she didn't. Which I guess is really common. She has been losing weight rapidly, exercising, and eating 'right.' But as of last week she has been eating less than 700 cal. She should be eating 1500kcal. 

I am concerned and she won't listen. She says she is never hungry and its not an issue. She is happy with the way things are going and has lost a dress size in the month she has been on it. Her weight scale says she lost 20 pounds in a month. She has 50 pounds left and I wonder if she will stop there or keep going, because she wants to be like her sister, who is shorter than her and about 70lbs lighter (105). 

I just worry she now has some form of anorexia that will turn into a real eating disorder soon. I am happy she is losing weight, she looks awesome, but I am worried all the compliments will encourage her to keep going at the pace she is now. And she will burn out. 

Any advice to help her?
<bot>: Friend is on a new medication that dampens hunger, now she barely eats because she doesn't feel hungry. Which I understand, but am concerned.