I have some very strong feelings on this issue. First, any teacher that would continue to push the issue with you on a daily bases is not being respectful. Schools and some of the teachers who work in them are more interested in having an easy day that getting the children what they need. The drugs that they put children on for "ADHD" are not good for developing brains.
I would say that your first course of actions should be to revise your daughters diet (and stop letting her eat cafeteria food at school - the stuff that they serve there isn't nutritional). You could try elimination diets (where you take your child off a certian substance too see if her sympthoms improve). ADHD sympthoms (as well as PPD and other autistic spectrum disorders) can be alleviated by eliminating things like refined sugars and high fructose corn syrup (this stuff is horribly nasty and is also in just about everything these days) and gluten. There are other food sources, but none come to mind at this exact moment. Secondly, Get the book Smart Medicine for a Heathlier Child by Janet Zand, Rachel Walton and Bob Rountree. It's a great book with a section on Hiperactivity. Do lots of research (not just from this book).
Also, I just want to mention that when I was a kid, the schools and doctors tried to tell my mother that I had ADHD, and wanted very much for her to put me on medication for it. She flat out refused. I couldn't sit still in class, couldn't pay attention, had very poor self control skills, I had difficulty making/keeping friends - all of the earmarks of ADHD. I too, could be extremely affectionate. Today I'm fine. My biggest downfall is that I struggle with trying to be organized. Could this be a symptom of adult "ADHD" or "ADD"? Sure, It could be. But there's no way on earth I will start popping pills for it because I don't believe that's the answer to the problem. There's no magic pill.
I've gone to college, gotten married, had children of my own (neither of which are showings symptoms of ADHD). I, as an adult knowing full well how difficult I was to handle, am so glad that my mother refused to put me on medication. I learned to deal with my problems. I learned to control my self and I learned how to demonstrate socially acceptable behaviors and eventually made some friends that I've kept through the years. By the time I hit college, I was able to concentrate and study and did fairly well studying law. I became a paralegal and loved the job. Now I'm a daycare provider and home childcare advocate. I also homeschool my own children (maybe this is an avenue for you to explore?)
Don't let them convince you that your child will not lead a successful life if you don't drug her up now so that they can "teach" her. Follow your heart, trust yourself and your daughter. I'm willing to bet that she'll be fine.