Talk to your doctor about your concerns but it sounds like she really needs it. She isn't abusing and as long as your not taking them too, I wouldn't worry about it. Some people really need this stuff and it is very, very helpful.
No, she will be fine. The child who is ADHD/ADD their chemical make up is different than others, they can stop and start this with NO problems if they are truly ADHD/ADD. For anyone else YES, but its different for them, I promise. My 9 year old, has been on it for 4 years, and over the weekends, and during spring break, and summer time, christmas time, and any other holiday, or if I just forget to give it to him, he is just fine. They call them medication holidays.
(I just had different types of drug holidays!!!!-LOL!)
Thanx guys...makes since, just felt better with other opnions. No I am not takin them. That is not the drugs that I seem to have some issues in.