In the case of study 329 although a numerical difference in adverse events was observed by the company and the study's investigators, for patients taking Seroxat compared to placebo, these findings were not, by themselves, considered clinically meaningful due to the limited number of patients involved and the fact that suicidal thinking and behaviour is a recognised symptom of the underlying disease.

BBC: GlaxoSmithKline logo

"Watching her and how her behaviour became more efficient during this time got me thinking about the links between maternal behaviour and maternal efficiency, " he said.

BBC: Mothers 'get Alzheimers boost'

Treatments include cognitive behaviour therapy, which helps people to break the cycle of faulty thinking, and hypnosis.

BBC: A source of anguish for many