WASHINGTON - Prescribing psychotropic medications to normal, healthy kids who want to boost their academic performance is "not justifiable" because it contravenes a physician's responsibility to promote a child's "authentic" development and to protect him or her against coercion by parents or peers, a group of neurologists and bioethicists has asserted.

When older adolescents who are closer to the age of autonomy (or their parents) ask for such medications, arguments against the practice are weaker, the group concluded. But it's still "inadvisable," they wrote.

Those arguments are contained in a new finding published in the journal Neurology on Wednesday.

They come against rising concern about the misuse and diversion of stimulant medications prescribed to people with attention-deficit hyperactivity disorder, often for purposes that have more to do with performance enhancement than recreation.

In recent years, the proportion of children diagnosed with ADHD and prescribed stimulant or other medication for the condition has risen steeply. So too has evidence of the medication's use by children and adolescents looking for an edge in test-taking.

Among 12th-graders, 3.4 percent acknowledged having used ADHD drugs in the last year for purposes other than those for which they are prescribed, according to a yearly federal survey of youth drug use. In the same 2008 survey, 2.9 percent of 10th-grade students and 1.6 percent of eighth-graders acknowledged having taken ADHD drugs for "nonmedical" purposes.

The neuro-ethicists wrote that widening use of ADHD medications and growing awareness and acceptance of the ADHD diagnosis have confronted physicians with increasing requests from parents and children to prescribe the medications to children who do not meet the clinical standards for an ADHD diagnosis. Some may come from parents of children who are developing normally but falling short of high expectations for grades and academic performance.

In such cases, physicians not only have an "essential fiduciary responsibility" to protect the child, but have a social obligation as well to prevent the misuse of a societal resource - medications - in ways that may give some children an unfair advantage over others, the neurologists wrote.

Physicians should explain to parents that there is no evidence that such drugs benefit children who do not need them, and explore with parents their goals and expectations for the child.