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Pharmacogenetic variation and the importance for medication treatment in patients at a Geriatric Psychiatry Unit

European Statement

Patient Safety and Quality Assurance

Author(s)

Margareth Kristiansen, Viola Melvik, Jahn Olav Svartsund, Randi Trondsen, Lise Nystad

Why was it done?

Patients admitted to the unit often have long-term illnesses, extensive medication histories and lengthy medication lists at admission. Psychopharmaceuticals are largely metabolized by enzymes that have polymorphism. We wanted to investigate the degree of pharmacogenetic variation in our patients and if genetic testing would have an impact on medication treatment.

What was done?

We have investigated the degree of genetic variation in our patients and to what extent the genetic profile impacted the choice of medication treatment.

How was it done?

We started out educating the staff at the ward. In 2018, 37 of a total 40 admitted patients were genetically tested at admission. The implication of the test result was discussed during the morning rounds for each patient ensuring implementation.
Results from each genetic test were continuously entered into a database including age, gender and medications at admission and discharge. Change of medication due to the genetic test result was recorded.
26 (70%) of patients had a genetic profile that could impact the choice of medication treatment. As a result, half of the patients had changes made to their medications. A total of 27 changes were made in these patients.

What has been achieved?

We have established that patients at the geriatric psychiatry unit in Nordland Hospital Trust have a pharmacogenetic profile that affects medication treatment options. Testing has an impact on the choice of pharmacotherapy to such an extent that all patients are now genetically tested at admission.

What next?

Pharmacogenetic testing has proven easy to implement and at the same time of substantial benefit for many patients. We also use our experiences to educate and inspire health care professionals in the community setting including GP’s so they can understand, reuse the test results and identify when a pharmacogenetic test would be a useful tool to determine the most adequate choice of pharmacotherapy.

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