I've taken them. I've tried most of the pharmaceuticals popular with my age group, from Anacin to Xanax. Even produces better writing. Unfortunately, the Oracle at Delphi is presently on sabbatical. However, common sense alone tells us that committed ethical vegetarians probably won't write cookbooks about veal.
People generally write from emotion.
Change the writer's serotonin mix, and his writing is automatically changed. All this suggests that writers are slaves to their chemical predisposition. Afraid of the blank page, a writer may take some form of medication in order to write. By consulting a great psychiatrist he may be more likely to improve his writing than if he consults a great writer. Perhaps, then, the emotions that the Kramers of this world seem eager to dull can be used rather than medically dissipated.