Skipping Blood Pressure Pills May Wipe Out Heart Protection, Study Finds
New research presented at ESC 2026 shows that taking blood pressure medication regularly is essential to reduce the risk of heart attack and stroke.
Illustration: AI-generated image
People who do not take their blood pressure medication consistently may lose most of the protection it offers against heart attacks and strokes, according to a new analysis of over 91,000 patients presented at the European Society of Cardiology (ESC) Congress 2026.
The research, led by scientists from the University of Oxford, pooled data from nine clinical trials involving 91,339 participants. It compared the cardiovascular outcomes of patients who adhered to their prescribed antihypertensive therapy with those who did not.
Participants were considered adherent if they took at least 80% of their prescribed doses. Researchers found that adherence declined over time, even in clinical trial settings. In the first year, 88% met the threshold, but by year five this fell to 79%.
The study revealed a clear link between adherence and blood pressure reduction. Among patients who followed their treatment well, the difference in systolic blood pressure between the treatment and control groups was 5.2 mmHg. For those with lower adherence, the difference was only 3 mmHg.
More importantly, the protective effect against major cardiovascular events—such as heart attack, stroke, ischaemic heart disease, and hospitalisation for heart failure—was only significant in the adherent group. Those patients saw an 11% relative reduction in such events. Patients with poor adherence showed no statistically significant benefit.
Qianqian Yang, a researcher at Oxford who presented the findings, said the results confirm that medicines cannot work as expected if patients do not take them as prescribed. She emphasised that the study looked at long-term adherence, not the occasional missed dose.
The authors suggest doctors should pay more attention to patients' difficulties in sticking to treatment. Proposed solutions include simplifying drug regimens, combining multiple medicines into a single pill, and using longer-acting drugs to reduce the impact of a missed dose. Regular check-ups on how patients take their medication are also recommended.
Professor Felix Mahfoud, chair of the ESC Communication Committee, noted that non-adherence has long been underestimated as a cause of uncontrolled high blood pressure.
For people in Romania and elsewhere, the message is clear: taking blood pressure medication as prescribed is crucial for protecting heart health.
