Two blood pressure medications may work better than one for older patients

Nearly half of all Americans live with high blood pressure, yet only one in four has the condition under control. The question of how to treat it—whether to push a single medication to its maximum strength or to add a second drug at lower doses—has long divided medical practice. A new study of more than 178,000 older patients enrolled in the Veterans Health Administration offers evidence that the answer depends less on medical dogma than on who the patient is.

For decades, the standard approach in geriatric medicine followed a simple rule: start low, go slow. A doctor would prescribe one blood pressure medication at a modest dose, then gradually increase it until reaching the maximum beneficial level. Only if blood pressure remained stubbornly elevated would a second medication enter the picture. The logic was sound—fewer pills meant fewer side effects and simpler routines for patients already managing multiple chronic conditions. But over the past ten years, clinical guidelines have shifted. They now recommend considering multiple medications at lower doses from the start, the idea being that smaller amounts of two drugs might achieve better control while sparing patients from the side effects that come with high-dose monotherapy.

Dr. Lillian Min, an associate professor of geriatric and palliative medicine at the University of Michigan who led the research, framed the dilemma plainly: Should doctors exhaust one medication before adding another, or should they adopt the newer approach of combining drugs earlier? The study examined patients already taking at least one blood pressure medication but not yet at maximum dose. About a quarter received an additional medication; the remaining 75 percent had their existing drug intensified. Both strategies lowered blood pressure. But the results diverged in ways that matter.

Patients who received a second medication at lower doses saw slightly larger reductions in their blood pressure readings. Yet they were less likely to stick with the regimen. Only half of those given an added medication continued taking it months later, compared to 65 percent of those whose doctors had simply increased the dose of their existing drug. The finding cuts to the heart of a tension in medicine: the most effective treatment is worthless if the patient abandons it.

Dan Lackland, an epidemiologist at the Medical University of South Carolina, noted that lower doses of multiple medications do tend to produce fewer side effects—a genuine advantage for patients already contending with a long list of pills. But he also acknowledged a psychological barrier that clinicians often underestimate. Some patients resist taking more than one blood pressure medication because they interpret it as a sign their condition is worsening, even when the clinical reality is the opposite. The perception of disease burden can itself undermine adherence.

Min emphasized that the findings argue against one-size-fits-all protocols. For patients already juggling numerous medications and multiple chronic conditions, the conversation between doctor and patient should weigh competing priorities: Is it more important to achieve blood pressure targets as quickly as possible, or to maintain a regimen simple enough that the patient will actually follow it? There is no universal answer. What matters is understanding the individual—their preferences, their capacity to manage complexity, their willingness to take multiple pills.

Lackland called for more research into strategies that might help patients feel more comfortable with multiple medications, and for clearer communication about why such regimens make sense. He underscored the stakes: controlling blood pressure reduces the risk of heart attack, stroke, and kidney failure. The goal is not perfection in the abstract but sustained, real-world management that actually happens in a patient's life. That requires knowing not just the science of blood pressure but the person holding the pill bottle.