Using side effects as treatment

Weight loss in the younger population generally tends to be less of a problem than weight gain (with the exception of eating disorders etc.).  However, in the elderly there are definitely situations where weight loss can be problematic.  In these instances we must rule out medications first as there are many medications that can cause weight loss in the elderly.  The acetylcholinesterace inhibitors (donepezil, etc.) and digoxin are a couple of examples of medications that need to be monitored for this potential adverse effect.  There are obviously medical conditions that can cause weight loss as well.  While keeping this in mind, there are times when we can’t identify medications or a new diagnosis as the cause for a troublesome weight loss.  Let’s take into account that a patient may have a corresponding depression as well as insomnia.  This is the type of case where we can try to kill two or three birds with one stone.  So we have a patient that may be on an antidepressant and insomnia medication with a new problem of weight loss.  I frequently see Remeron (mirtazapine) used in this case as it has a side effect profile that tends to cause weight gain and sedation as well as certainly being indicated for the treatment of depression.

2 Comments

  1. Sean Navin

    Is there a dose where of mirtazepine where you can get appetite and sedation effects but not antidepressant? As a comparison, one might not see the antidepressant effects of trazadone until about 200 mg whereas you can still get the sedative effects for sleep as low as 25-50 mg.

    Reply
    • chri1599

      Good question! – There’s no perfect answer to that unfortunately because every patient is different. For sedative/appetite effects, 7.5 – 15mg might get you there, but where you go with the dose will ultimately depend upon patient response. Start low, go slow, and assess to see what the response is always what I focus on first!

      Reply

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Written By Eric Christianson

January 5, 2014

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