Saturday, March 13, 2010
Placebo: Buy Shares Now!
In his wide-ranging New Yorker piece, “Head Case,” about the state of psychopharmacology (is it evil or merely useless?), Louis Menand reviews Irving Kirsch’s book The Emperor’s New Drugs (Basic; $23.95). Kirsch, a psychologist in the UK, argues that antidepressants are just (I hate that!) expensive placebos. While they usually do a little better than placebos in drug trials, Kirsh argues that there is no good way to protect the double-blind nature of such trials; most antidepressants have side effects such as nausea, restlessness, and dry mouth. Once a patient detects those, he knows he’s on the drug side of the trial. A patient feeling no side effects may assume he’s taking sugar pills and may get more depressed than he was to begin with, amplifying the minimal statistical gap. Great point, but...
Well, read the whole piece. It’s fascinating. I certainly don’t want to minimize the importance of hucksterism and venality in the psychopharmacology business, and I want to write more about it soon, but I just want to say here what I always do when I hear about billion-dollar drugs that don’t beat placebos in trials: Let’s invest in the placebo effect! It helps at least a third of severely depressed patients. And it also helps patients with Parkinson’s, and chronic pain, some kinds of epilepsy, and many, many other serious conditions. When we figure out what’s going on with placebos, doctors--or clerks for that matter-- may be able to prescribe them honestly, inexpensively, and in good conscience and make millions of people better. And a little side benefit: we’ll begin to map the current no-man’s land extending the broad distance between neurology (the science of the brain) and psychology (the science of the mind). That should bring with it some other exciting (anti-depressing!) philosophical benefits, too.