At least some people believe they are – particularly those drug companies whose pipeline champions are being sunk by the famous effect. This Wired article offers a great list of drugs recently entombed by the placebo effect. It also explains it’s history and the concern it is causing in drug development. But I disagree that the placebo effect is ‘increasing’ as they suggest.
The drop in drug approvals they cite and many of the specific examples they give are probably not due to an ‘increasing placebo effect’ but poor trial design, less effective new therapies and the lack of low hanging fruit. I would even suggest that the perceived change in the effectiveness of Prozac is actually the result of better experimental measurement leading to better data that demonstrates what clinicians have always known.
Trials are becoming harder to design as there is less money available – in part because potential profits from new drugs are not what they used to be. Studies are ‘powered’ at an absolute minimum, and resources sent offshore to clinics with high capacity but lower quality guarantees. This is of particular concern in studies where drug efficacy is highly dependant on patient or clinician reporting rather than hard measures such as well defined lab tests. They Merck scientist in fact demonstrates this when he says they saw different effects in Spain and France.
They author also fails to mention that many new drugs being trialled are in therapeutic areas fairly well served by existing drugs. there is less room for improvement and therefore it is harder to create more efficacious drugs. Early phase testing is easily misleading due to small sample size and other biases.
When the article delves into the cognitive neuroscience behind the placebo effect they indeed point to the fact that by definition, the placebo effect can’t ‘increase’ unless the human brain changed substantially in the last 40 years.
Despite this it is a great article and I look forward to hearing more about the Placebo Response Drug Trials Survey.
Filed under: biotech, pharmaceuticals | Tagged: clinical trials, drug development, placebo |
Future Health Analyst 
Gabatronic, thanks for this comment on my article, which is helpful.
I want to point out that I *do* talk about the widespread use of placebos in clinical practice.
“Meanwhile, the classic use of placebos in medicine—to boost the confidence of anxious patients—has been employed tacitly for ages. Nearly half of the doctors polled in a 2007 survey in Chicago admitted to prescribing medications they knew were ineffective for a patient’s condition—or prescribing effective drugs in doses too low to produce actual benefit—in order to provoke a placebo response.”
Hi Steve,
Thanks for your comment. I had missed that reference and have updated my post accordingly. I enjoyed your article very much. Keep up the good work.
Gabe