Regulatory problem

In February 1990 an article raised concerns that the recently licensed fluoxetine might trigger suicide acts in depressed patients.3 A series of meta-analyses of published and unpublished antidepressant trials subsequently failed to show benefit in terms of suicidal acts with active treatment compared with placebo.4^–9 In fact, each analysis showed a small excess risk with active treatment for all classes of antidepressants, although the increases are compatible with chance and the original authors concluded there were no differences. For much of the 1990s campaigners were saying trials with placebo controls in depression were unethical, and these analyses were attempts to justify placebo controlled trials.

I recently participated in a cumulative meta-analysis of published trials that found an excess of suicide attempts in patients taking selective serotonin reuptake inhibitors (SSRIs) compared with those taking placebo.10 The numbers in the individual trials are small, so that although from 1988 onwards the point estimate indicates roughly a doubling of the risks of suicidal acts with SSRIs, the effect has only recently been consistently significant. Nevertheless, the trend should have been seen by both companies and regulators as something that required investigation before …