Comment by jlebar

Scott Alexander observes in this piece https://www.astralcodexten.com/p/all-medications-are-insigni... that the effect size for even EXTREMELY EFFECTIVE medications are remarkably low.

> Zolpidem (“Ambien”) has effect size around 0.39 for getting you to sleep faster. Ibuprofen (“Advil”, “Motrin”) has effect sizes between from about 0.20 (for surgical pain) to 0.42 (for arthritis). All of these are around the 0.30 effect size of antidepressants.

...

> Some of our favorite medications, including statins, anticholinergics, and bisphosphonates, don’t reach the 0.50 level. And many more, including triptans, benzodiazepines (!), and Ritalin (!!) don’t reach 0.875.

As for why, read his essay I guess. But I wouldn't take at face value the interpretation of effect sizes in the original article.

(I also couldn't say why the effect size of vit D and Omega-3's is so large, although per Scott Alexander's article if fewer people drop out of the treatment group, that should increase the effect size, so maybe the relative tolerability of the treatments is part of the story?)