Too Few Warnings? Too Many? Just Right?

The AP has a story on the possibly negative effects of another increased set of warnings on SSRI anti-depressants.

Mental health experts are worried the prospect of additional warnings about the risk of suicide linked to antidepressants could curtail the medicines' use and ultimately do more harm than good.

Regardless of the merits of these warnings, it's a good reminder of the fact that additional warnings are not always "free," given dangers like these and of warning dilution more generally.