Is it just me? I don’t think that I have visited with a single patient this week who’s not struggling with sleep. Our heavily caffeinated, media-obsessed, melatonin-killing, computer-screen-staring, tragic work-life imbalances explain away a lot of it. Knowing that, though, patients in front of me seek immediate relief.
A prescription takes substantially less effort than does training patients on sleep hygiene or sleep restriction. The problem with “z” drugs is, of course, that tolerance can develop within 4 weeks with daily use. These drugs have been associated with mood and cognitive changes and increased mortality. Many of my patients cannot use them sparingly, because relief of insomnia is something of which they cannot get enough. Then we are either back to square one or playing the dose-escalation game.
I have always wondered how much of this is the “placebo effect” and how we could use this to our clinical advantage. This is certainly what I hear from my cynical colleagues when I recommend melatonin – which, by the way, I personally believe is an extremely effective and underutilized intervention. We should remind ourselves to be cognizant of the “if I can’t prescribe it, it can’t work that well” mentality.
Alexander Winkler and Winfried Rief of the University of Marburg, Germany, conducted a brilliant systematic review examining the effect of placebo conditions in randomized trials including polysomnography addressing primary insomnia (Sleep. 2015 Jun 1;38[6]:925-31).
The investigators identified 32 studies with almost 4,000 patients in 82 treatment conditions: The studies were published between 1992 and 2012. Of those 82 treatment conditions, 17 included hypnotic drugs.
Results suggest that 64% of drug response to medications for primary insomnia is achieved in the placebo group.
So what does this mean clinically? I think the first thing it means is that we should consider (re)launching frank discourse about the ethics surrounding the use of placebo in clinical medicine. Are we all too horrified to think that patients may get better despite us rather than because of us to dig too deeply here?
The second thing it means is that patients should be instructed to use the medications only when needed. If a minority of the drug effect for insomnia is from the drug itself, we should minimize the buildup of tolerance by using it sparingly. Studies that have alternated a hypnotic with a placebo show that this works just as well as using a hypnotic every night.
Patients should be encouraged to alternate therapy, such as trying melatonin first and resorting to a “z” drug only if sleep remains elusive. Alternating drug therapy may also enhance the efficacy of the medication.
Always try to combine pharmacotherapy with good sleep hygiene to maximize benefits.
Dr. Ebbert is professor of medicine, a general internist at the Mayo Clinic in Rochester, Minn., and a diplomate of the American Board of Addiction Medicine. The opinions expressed are those of the author and do not necessarily represent the views and opinions of the Mayo Clinic. The opinions expressed in this article should not be used to diagnose or treat any medical condition nor should they be used as a substitute for medical advice from a qualified, board-certified practicing clinician. Dr. Ebbert has no relevant financial disclosures about this article. Follow him on Twitter @jonebbert.