ash wrote:

what exactly is wrong with doxepin and amitriptyline?

If used as antidepressants, especially in the elderly, many argue that the anticholinergic, sedative and postural hypotension side-effects of tricyclics make them a less appropriate choice than an SSRI.

However, I agree that tricyclic antidepressant drugs (or antiepileptic drugs) can have a place for neuropathic pain.

Horst Herb wrote:

So, would my patients have been labelled in this "study" as prescribed something "potentially inappropriate", or did they undertake the effort to investigate whether there was an acceptable indication where no alternative drug would have been likely to yield a better benefit/risk ratio?

Clearly, this is the crux of the matter as Ash also implied. A drug that may not be the drug of choice for all can certainly be the best drug for a particular patient. And this degree of detail can only come from discussion with the treating doctor, not from analysing computer databases. Hence the paper's title, "Potentially inappropriate..."

Having said that, I don't agree that studies such as this are only an "academic wank".

It's a reasonable hypothesis that the levels of "potentially inappropriate" prescribing in the elderly revealed by this study are greater than what might be expected if all doctors were as thoughtful in their prescribing as Ash & Horst. Such data can cause each of us to reflect on whether we are always prescribing appropriately &/or whether our knowledge is up-to-date.

I remember a relatively recent survey of prescribing for uncomplicated UTI which showed a number of GPs were still prescribing co-trimoxazole. When I asked them why they said that I had taught them to do so!

And so I had, 30 years ago!

But subsequently, we found that the so-called "synergy" between trimethoprim and sulphamethozaxole only occurred in vitro, the cure rates of trimethoprim alone were identical to the combination, and the long-acting sulphonamide component was associated with occasionally severe and totally unnecessary side-effects. So 20 years ago we changed to teaching that trimethoprim alone was preferable to the combination.

But not everyone  caught up!

So drug utilisation surveys can be useful despite their obvious limitations.

We are left with the question of how best to stimulate people to reflect on whether or not their prescribing is "potentially inappropriate..."

Cheers
Ken
--
Dr. Ken Harvey
Adjunct Senior Research Fellow
School of Public Health, La Trobe University
http://www.medreach.com.au
VOIP:  +61 (03) 9029 0634; Mobile +61 (04) 1918 1910
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