“Kan reactievermogen beïnvloeden – Ik kan dan uitslag krijgen of zoiets?”: Kwalitatief onderzoek naar de begrijpelijkheid van instructies op de etiketten van geneesmiddelverpakkingen en de rol van gezondheidsvaardigheden

Drug labels instructions are physically attached to each package dispensed
to patients and consist of dosage instructions (e.g., ‘Take two capsules twice
daily’), auxiliary warnings (e.g., ‘Do not drink alcoholic beverages’) and
advices (e.g., ‘Take with food or milk’). They are often misinterpreted which
may lead to incorrect drug use. The wordings of instructions are a cause of
such misinterpretation, especially for people with limited health literacy.
In a qualitative study, we explored pharmacy visitors’ interpretations of
drug label instructions and their opinions on potential improvements.
Semi-structured interviews were conducted with 39 pharmacy visitors
with limited and adequate health literacy. They received seven drug label
instructions and explained them in their own words and demonstrated how
much and how often they would take the drugs on a timetable. Although
pharmacy visitors were able to explain dosage instructions, they often made
mistakes in demonstrating them, especially those with limited health literacy.
Medical jargon (e.g., ‘drowsiness’) and difficult words (e.g., ‘maximum’) lead
to misinterpretations, especially among pharmacy visitors with limited
health literacy. When optimizing drug label instructions, a trade-off must
be made between the comprehensibility and the nuance of instructions.