My Daughter Was Prescribed Adderall For Adult ADD Several Years

My daughter was prescribed Adderall for adult ADD several years ago. She has been taking faithfully as far as I know. She has lost a tremendous amount of weight, of course, and has developed widening of her eyes intermittently. She is loud, easily agitated, and making poor decisions. She also has spent unknown amounts of money somewhere, no one knows. She is 36 years old. She swears she is being monitored by a psychiatrist who prescribed this drug, but I do not believe this. I am a nurse. I am worried. She is an adult living 800 miles from me. I am suspecting addiction. Can you please advise me?