Scientists reveal the hidden danger of missing blood pressure medication

A massive study reveals that frequently missing blood pressure medication could wipe out much of its lifesaving protection against heart attacks and strokes. Credit: Shutterstock

Missing doses of blood pressure medication could significantly reduce its ability to protect against heart attacks, strokes, and other serious cardiovascular problems, according to findings presented at ESC Congress 2026.

An estimated 1.4 billion adults worldwide between the ages of 30 and 79 have high blood pressure (hypertension), a major contributor to illness and death. Although medications that lower blood pressure are proven to reduce the risk of cardiovascular complications, approximately half of patients do not take their prescriptions as directed.

"We have evidence that poor adherence to antihypertensive medication is associated with worse outcomes," explained presenter, Miss Qianqian Yang from the University of Oxford, UK. "However, previous data has come from observational studies and could be confounded by other factors. We undertook an analysis of randomized trial data to assess the true impact of adherence on the benefits of antihypertensive treatment."

Major Study Examines the Impact of Missed Blood Pressure Medication

To better understand how consistently taking medication affects its benefits, researchers analyzed individual patient data from 91,339 participants across nine clinical trials. Each trial compared a blood pressure treatment (intervention group) with an alternative approach (comparator group: either placebo or a less-intensive regimen).

The researchers divided participants into two categories based on how closely they followed their prescribed treatment. Those who took at least 80% of their assigned medication were considered to have higher adherence, while those who took less than 80% were placed in the lower adherence group.

Even with the regular monitoring and structured conditions of clinical trials, patients became less consistent about taking their medication as time passed.

"A decline in adherence over time was apparent, even in the structured setting of trials," noted Miss Yang. Overall, 88% of participants met the higher adherence threshold during the first year, but that figure had dropped to just 79% by the fifth year.

Skipping Blood Pressure Pills Reduces Treatment Benefits

The difference in medication adherence was reflected in how much patients' blood pressure improved.

Among participants with higher adherence, systolic blood pressure, the top number in a blood pressure reading, was 5.2 mmHg lower in the intervention group than in the comparator group. For those with lower adherence, the difference was considerably smaller at just 3.0 mmHg.

Researchers then examined whether these differences translated into protection against major cardiovascular problems. The outcomes included strokes, heart attacks (myocardial infarction), ischemic heart disease, and heart failure that resulted in hospitalization or death.

The findings revealed a striking contrast. Among patients who consistently followed their treatment plans, the intervention group experienced an 11% lower incidence of major cardiovascular events compared with the comparator group. However, among patients with lower adherence, there was no statistically significant reduction in these events.

"Notably, our results reinforce the saying that 'drugs don't work in patients who don't take them.' Patients with lower adherence derived little or no cardiovascular benefit, whereas those with higher adherence had greater reductions in blood pressure and prevention of cardiovascular events," said Miss Yang.

Helping Patients Get Lifesaving Heart Protection

The researchers believe that helping people take their medication consistently should become a greater priority in the treatment of high blood pressure. They recommend more routine assessments of medication adherence, along with better patient education and practical strategies to make treatment easier to follow.

Possible approaches include simplifying medication schedules, combining multiple treatments into a single pill, and prescribing longer-acting drugs that can help limit the consequences of an occasional missed dose.

Professor Felix Mahfoud, Chair of the ESC Communication Committee, emphasized that missed medication has received too little attention as a contributor to poorly controlled blood pressure.

"For years, we have neglected non-adherence to medication as a cause for uncontrolled hypertension. Assessment of adherence should become a routine part of hypertension care so patients do not miss out on life-saving benefits. As healthcare providers, we are here to have open, non-judgmental conversations with our patients about any barriers they may have to taking medication, to help improve adherence."

Story Source:

Materials provided by European Society of Cardiology. Note: Content may be edited for style and length.

 

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European Society of Cardiology. "Scientists reveal the hidden danger of missing blood pressure medication." ScienceDaily. ScienceDaily, 25 October 2026. <www.sciencedaily.com / releases / 2026 / 10 / 261024222028.htm>.

 

 

Just two drinks a day may be far riskier than you think

 

Even alcohol consumption that many Americans would describe as moderate may carry significant health risks, including a greater likelihood of premature death, disability, cancer, and heart disease. That is the conclusion of a new study published in the Journal of Studies on Alcohol and Drugs, a journal published at Rutgers University.

The research, known as the Alcohol Intake and Health Study, was originally commissioned by the U.S. federal government to help shape updated national dietary recommendations. Researchers estimated that people who consume an average of 14 alcoholic drinks per week face a 1 in 25 lifetime risk of dying from alcohol-related causes. By comparison, consuming up to seven drinks weekly was linked to only small increases in risk for most health conditions.

"Even low levels of alcohol use come with health risks," says lead study author Kevin Shield, Ph.D., an associate professor at the University of Toronto and a senior scientist who leads the World Health Organization (WHO)/Pan American Health Organization (PAHO) Collaborating Centre in Addiction and Mental Health. "And that risk continues to increase the more someone drinks."

How Scientists Measured the Health Risks of Alcohol

To better understand the long-term consequences of drinking, Shield and his colleagues in the United States and Canada investigated how alcohol consumption over a lifetime contributes to disease and premature death among Americans.

Medical experts first examined more than 7,200 scientific publications covering illnesses and injuries associated with alcohol. Using this evidence, they estimated the risks for individual health conditions and combined those findings with large national health data sets. Statistical models then allowed the team to calculate how different levels of alcohol consumption affect the likelihood of developing serious health problems or dying prematurely.

The findings provide specific estimates that are missing from the latest U.S. Dietary Guidelines. The updated recommendations simply encourage Americans to "limit alcoholic beverages" without identifying a particular consumption threshold. Earlier versions advised men to drink no more than two alcoholic beverages per day and women no more than one.

"While the new U.S. Dietary Guidelines contain a useful 'less-is-best' message, they provide no quantitative framework. Our study was designed to do just that across the drinking spectrum," says study co-author Timothy Naimi, M.D., M.P.H., director of the University of Victoria's Canadian Institute for Substance Use Research and an adjunct professor at Boston University.

"It turns out that two drinks per day, which might be considered 'moderate' from a social standpoint, is associated with a substantially elevated risk of a premature death caused by alcohol," explains Naimi.

Moderate Drinking Offers No Significant Overall Health Benefits

The researchers looked beyond the risk of premature death to examine alcohol's connection to a wide range of immediate and long-term health problems. These included cancers (e.g., esophageal, oral, and breast), cardiovascular disease, liver disease, and injuries.

One of the study's most important findings challenges the longstanding belief that consuming small amounts of alcohol can improve health, particularly heart health.

"We did not observe a significant protective effect of alcohol on health at any level of consumption," says Shield. "At low levels, alcohol may be associated with a reduced risk of ischemic heart disease and stroke. But when you look across the full range of health outcomes, including cancer and other chronic diseases, those potential benefits are outweighed by the risks even at 7 drinks per week."

In other words, while some studies have suggested that light drinking may benefit certain aspects of cardiovascular health, those possible advantages do not translate into an overall health benefit once alcohol's links to cancer and other diseases are taken into account.

Why Individual Alcohol Risks Can Differ

Although the analysis drew on extensive scientific evidence, the researchers emphasize that its estimates describe risks across populations rather than predicting precisely what will happen to any particular person.

Shield says the statistical calculations relied on "the best possible data." However, he cautions that individual circumstances can substantially influence the results.

"However, we can't assume that means one person's individual health risk is the same as what is reported here -- that depends on other factors like lifestyle, genetics, drinking patterns, and other choices that differ person to person."

To estimate alcohol's overall impact, the researchers calculated risks for health conditions already known to be caused by alcohol and combined them into a broader assessment. However, scientists are continuing to investigate additional possible consequences of drinking, including emerging evidence connecting alcohol consumption to pancreatic cancer.

"Understanding those relationships, and how much alcohol contributes to those risks, is an area that still needs further work," says Shield.

What the Findings Mean for U.S. Drinking Guidelines

The results suggest that alcohol-related health risks become more pronounced when consumption exceeds one drink per day, regardless of whether the person is male or female. This provides a more specific reference point for people trying to understand how their drinking habits might affect their long-term health.

Rather than suggesting that any particular amount is completely safe, the findings show how risks increase with greater consumption and why drinking less generally reduces exposure to alcohol-related harm.

"Having a clearer threshold helps people better understand what level of drinking is associated with increased risk and make more informed decisions when drinking," says Shield.

The study has also raised questions about how scientific evidence was incorporated into federal dietary recommendations.

In an accompanying editorial, Robert M. Vincent, a former Associate Administrator for the U.S. Substance Abuse and Mental Health Services Administration, offers his perspective on the circumstances surrounding the research and its role in the development of national guidance.

"The Alcohol Intake and Health report was explicitly invited to inform alcohol guidance during development of the Dietary Guidelines for Americans, 2025-2030," he writes. "Despite the study's adherence to its mandate, its findings were sidelined."

Journal Reference:

1. Sinead George, Timothy S. Naimi, Katherine Keyes, Priscilla Martinez-Matyszczyk, Adam J. Milam, Jürgen Rehm, Alvaro Alonso, Steven Bell, Annie Britton, Laura Llamosas-Falcón, Erin Hobin, Suzanne E. Judd, Amy Justice, Christopher Kahler, Suthat Liangpunsakul, Stephanie K. Jones, Gregory Marcus, Katherine McGlynn, Derek Satre, Mingyang Song, Aaron Peter Thrift, Tomoko Udo, Ashley Wettlaufer, Zuo-Feng Zhang, Kevin Shield. Alcohol Intake and Health Study: No Protective Effect at Low Levels, With Mortality Increasing to 1 in 25 at 14 Drinks Per Week. Journal of Studies on Alcohol and Drugs, 2026; 87 (4): 621 DOI: 10.15288/jsad.25-00435

Cite This Page:

Journal of Studies on Alcohol and Drugs. "Just two drinks a day may be far riskier than you think." ScienceDaily. ScienceDaily, 25 October 2026. <www.sciencedaily.com / releases / 2026 / 10 / 261024222030.htm>.