Researchers found the number of drugs introduced during the last 30 years had in fact increased slightly, the BMJ Open journal reported.

BBC: Falling drug breakthroughs 'a myth'

The Swedish study is reported in the journal BMJ Open.

BBC: Aspirin may 'slow elderly brain decline', study finds

Release of the editorial comes as a study published by BMJ Open - part of the British Medical Journal group - claimed that GPs were at high risk of burnout.

BBC: Plans for NHS in England an unholy mess, say journals