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SIMULATION CURVES MAY HELP TO ASSESS ANTIBIOTICS ORALISATION PROCEDURES (submitted in 2019)

European Statement

Clinical Pharmacy Services

Author(s)

Andreas von Ameln-Mayerhofer, Martin Breuling, Ina Geist

Why was it done?

In the context of antibiotic stewardship, rapid oralisation of a parenteral antibiotic is recommended in many antibiotic stewardship guidelines. Such a sequence therapy is easy to implement if both application pathways lead to comparable efficacy levels at the site of infection. However, this does not apply to all anti-infectives, in particular some beta-lactam antibiotics represent a challenge in therapy. Additionally, the information about this topic is very sparse in the literature.

What was done?

In order to achieve an improvement in antimicrobial prescriptions, we have addressed possible problems regarding oralisation of antibiotics. For this purpose, we graphically compared the simulated efficacy levels of parenteral and oral forms of beta-lactams.

How was it done?

We programmed a computer based procedure that allows a simulation of plasma levels of antibiotics upon intravenous versus oral administration. Based on the obtained data and EUCAST-based MIC-distributions for a set of bacteria, we assessed the respective putative clinical actions.

What has been achieved?

Our simulations show that some oral beta-lactams do not reach the PK/PD condition of a sufficient therapy (fT>MHK) in the approved dosage. The simulations have been used for education seminars with physicians and partly led to an improvement in oralisation procedures. Additionally, an oralisation standard has been established.

What next?

Our next step is to develop a special prescription form for oral antibiotics which will enable us to control prescription behaviour even more effectively. We plan to monitor the prescription habits for anti-infectives more closely before and after establishing the prescription form.

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