I can not stress enough how a superior comprehensive testing to find out the cause of inattention, hyperactivity and moodiness can be. ADHD has been misdiagnosed and over-diagnosed for such a long time now that prescription medications are accepted as normal for a large percentage of children. Giving (as young as) three-year olds amphetamine and antidepressant based medicines for ADHD is repulsive, if in fact they do not need them.
How awful to have your child given ADHD medications, like amphetamines, when in actuality they could have hyperthyroidism. ADHD and the thyroid (a disease or imbalance) can both have symptoms that are similar. One of the earliest symptoms of a thyroid problem is hyperactivity and nervousness, forgetfulness and inattention. In the International Society of Psychoneuroendocrinology (ISPNE) a report was published by the University of Maryland School of Medicine researchers Peter Hauser, professor of psychiatry, and Dr. Bruce Weintraub, professor of medicine at the University of Maryland, School of Medicine, finding a positive connection between elevated levels of certain thyroid hormones and the connection to ADHD like symptoms of hyperactivity and impulsivity.
So if your child appears to have symptoms common to ADHD, but a doctor says, "No they do not have the disorder", you need to check into a resistance to thyroid hormone which blood tests can detect. They will be prescribed the correct medication that will correct the condition.
If your child does in fact have ADHD and not a thyroid problem there are other alternatives between prescription drugs. Many parents are trying alternatives such as unprocessed foods, no artificial ingredients and supplements specifically designed for ADHD which have been shown to work as well as Ritalin in some cases.