Which is safer? Adderall or ephedrine?

Please only answer the question at hand, lectures will be ignored.

I've been suffering with EDNOS for 3 years, and have major binge/purge tendencies. I find I cannot restrict my eating, I either eat nothing, which I find myself able to do for up to 5 days, or I eat everything in sight and then purge. I overeat even if I have not been starving beforehand and am not hungry, so it is not due to hunger. I am of normal weight (female, 6'0 tall, around 145 lbs although this varies depending on my eating, or lack of).

I find the only way I have been able to eat normally is by taking adderall or ephedrine and then planning my meals. I have done my absolute best over the previous years to follow healthy eating plans, but without the use of either of these drugs, I simply haven't found the willpower. Something in my head just takes over me.

Obviously I do not want to become dependent on drugs, so I simply want to take one or the other for a few weeks to try and break my eating habits. However, I want to know, if there is a difference, which one is safer in terms of likelihood of addiction and damage to the body? (I don't think I could do much more damage to my body with these drugs than I have with my eating - I have lost my period, find myself weak and feel faint most of the time, my muscle tone has become incredibly weak, I find myself unable to concentrate, have become very depressed, etc)

Please no suggestions about going into treatment. I am an A* grade A level student with hopes of going to Oxford and do not feel as if I can afford to disrupt my studies. Thank you.
I am not attempting to brag about my 'credentials', I am simply explaining why I do not feel that going into treatment is an option.

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Recommended Answer:
You may be an "A" level student with hopes of getting into Oxford, but you obviously have not caught on to the facts that:
a. You are attempting to trade one body-damaging addiction for another
b. You are not going to be able to break the cycle of addiction without professional help. Eating disorders are notoriously difficult to treat with professional help, much less trying to go it alone by self-medicating.

Sorry if you interpret advice that you are seeking as a lecture, but I don't see the point of answering "either/or" questions that give me a choice between "should I kill myself with a bullet or by hanging" as serving any purpose either.