A systematic review of pharmacogenetic testing in primary care: Attitudes of patients, general practitioners, and pharmacists

BACKGROUND: Pharmacogenetic testing enhances patient safety by improving medical treatment and reducing side effects. It has shown potential in both primary and secondary care. However, implementation in healthcare, particularly in primary care, is slow. OBJECTIVE: The objective was to review articles published on the attitudes towards, and knowledge on pharmacogenetic testing in primary care, among general practitioners, pharmacists, and patients. METHODS: The review was performed according to the PRISMA checklist. A systemized literature search was followed by a 2-step screening process. Apart from the content of articles being within the scope of the review, inclusion criteria included: articles in English; primary research articles; qualitative, quantitative, or mixed methods. Content analysis was conducted as a qualitative meta-synthesis. The methodological rigor of included articles was assessed. RESULTS: Fifteen studies were included. The analysis resulted in the following main themes: i) benefits of pharmacogenetic testing, ii) barriers to pharmacogenetic testing, iii) pharmacists' role in pharmacogenetic counselling, and iv) pharmacists' knowledge on pharmacogenetics. Methodological rigor was generally medium/high. CONCLUSIONS: More studies are needed in this area, and there is a need for more education on pharmacogenetic testing for healthcare professionals. Issues like patient autonomy, economy, and access to tests also need to be addressed.