Understandable drug information

We expect that, compared to a standard text-only, a leaflet with pictograms leads to better perceived comprehensibility, utility and design quality of the leaflet
by consumers. This could lead to better recall and understanding of the drug information, increasing patients’ self-efficacy, and in turn intention to adhere and actual adherence, which could lead to better blood pressure control. Additionally, we aim to gain insight into the
question as to whether such intervention is especially beneficial for low-literate people, who are not sufficiently helped with a text-only leaflet format.

Blood pressure control means that the patient has achieved the target blood pressure that was set out by their treating physician. Values at baseline (last measurement by HCP before first prescription of
antihypertensive drugs) will be compared to blood pressure measurements of the first routine check-up (usually three weeks after start of medication).

The secondary outcomes will be measured during two interviews - one at t=2-3 weeks and one at t=4-5 weeks after the patients have received the leaflet in the pharmacy.

The control group will receive a secondary patient information leaflet that is text-only; the intervention group will receive the same information with pictograms added.