13 August 2013 - BBC News - Use of ADHD drugs 'increases by 50% in six years'

NHS prescriptions for methylphenidate drugs, including Ritalin, rose from 420,000 in 2007 to 657,000 last year, the Care Quality Commission said.

The watchdog warned health workers to "carefully monitor" their use as they have the potential to be "abused".

The drugs are one of a number linked to the "smart-drug" craze, where students take medication to help them focus.