The wikipedia article “Attention Deficit Hyperactivity Disorder controversies” contains the following:
The Church of Scientology, which opposes all forms of psychiatry, has vocally criticized ADHD and its treatments and played a leading role in the anti-Ritalin campaign in the late 1980s. The church states that treatment merely lessens the symptoms rather than addresses the underlying cause, “mental and behavioral problems are largely incorrect diagnoses that cover symptoms and don’t handle the real problems, which may be physical or spiritual”.
I tried to add after that:
The made-up nonsense-cult Scientologism also opposes giving dangerous drugs to children, and their views on the subject are exactly as relevant as those of L. Ron Hubbard.