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Medical treatment of high blood pressure in patients with ileostomy

European Statement

Clinical Pharmacy Services

Author(s)

Guillaume Wabont, Jean-Philippe Hammelin, Guénaëlle Faure, Cathy Debruille, Kévin Raynaud, Pascale Guillain

Why was it done?

Clinical pharmacists and nephrologists noticed a recurrence of rehospitalization of patients who recently underwent ileostomy because of prerenal acute kidney injury. Ileostomy tends to enhance dehydration, but in each case there was a drug that was exacerbating the phenomenon by inhibiting the RAAS. The digestive and urologic surgeons had no knowledge of such pathophysiology and iatrogenia, explaining why they continued to prescribe such drugs.

What was done?

We elaborated an internal guideline for the treatment of high blood pressure (HBP) in patients with ileostomy. We decided to contraindicate to those patients the inhibitors of renin-angiotensin-aldosterone system (RAAS) such as angiotensin-converting enzyme inhibitors (ACEi), angiotensin receptor blockers (ARBs) or direct renin inhibitors (DRI); as well as the diuretics – even-though none of the summaries of the product characteristics (SmPC) of those drugs in question require such prohibition.
From now on, the drug(s) of the first line of treatment must be a beta-blocker and/or a calcic inhibitor. The drug(s) of the second line of treatment must be an alpha-blocker and/or an imidazoline-receptor agonist.

How was it done?

Therefore, we decided to set up a collective analysis of the situation with pharmacists, nephrologists and surgeons in digestive and urologic surgery, to understand the pathophysiology and to elaborate an internal guideline for HBP in patients with ileostomy.

The pharmacists first wrote a working paper retailing:
– the pathophysiology (water–electrolyte imbalance with ileostomy and deterioration under RAAS inhibitors or diuretic)
– the lack of information in the SmPC of the drugs in question
– an argued suggestion to contraindicate those drugs
– the therapeutic alternatives

Then we all met and exchanged views on the subject.

What has been achieved?

The guideline has been written in a collaborative and multi-disciplinary work. It applies to all the physicians and pharmacists of the hospital who have been informed of our approach and they have received a copy of it.

What next?

We will evaluate the respect of the guideline in our hospital as well as its impact in the lowering of the rehospitalization rate of patients who recently underwent ileostomy.
We will notify our national agency for medicines of our procedure because we think it should be a national standard.

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