Can Low Blood Pressure Be Dangerous?

A doctor’s advice on conditions that can cause low blood pressure, and when you need to be concerned

Adam Rosenbluth, M.D.,

AARP

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Published May 04, 2026

Is there anything I can do about my low blood pressure?

Low blood pressure often worries people, but the first thing I usually tell my patients may surprise them: In many cases, it’s actually a good thing. Normal blood pressure for folks over 65 is generally around 120/80. But most people I see in my office struggle with blood pressure that’s higher. If your blood pressure runs on the lower side and you feel perfectly fine, there’s usually not a problem that needs fixing. I have patients who come into my office with low readings, around 80/50, and they feel absolutely normal — not dizzy, not faint, not fatigued. In situations like this, low blood pressure is simply a normal variation and not something to treat.

It becomes an issue when symptoms appear. Low blood pressure deserves attention if it causes dizziness, lightheadedness, fatigue, blurry vision or fainting, which we call syncope. Those symptoms mean your brain may not be getting enough blood flow at certain moments. For older adults especially, that can lead to falls, which can quickly become a serious health issue. So the real question isn’t simply, “What can I do about my low pressure?” but rather, “Is my blood pressure causing symptoms?” If it is, the next step is figuring out why.

One common cause is medication. I recently spoke with a patient who had a long history of high blood pressure. Over the past six weeks, he had lost 17 pounds while taking a GLP-1 medication for weight loss. That weight loss lowered his blood pressure significantly, and he was still taking the same blood pressure medication he’d needed before. The result was dizziness. Once we adjusted his medication, his blood pressure stabilized to around 130/80, and he felt perfectly well.

Dehydration is another frequent culprit, particularly among older adults. Many people try to limit how much they drink because they’re worried about frequent trips to the bathroom. But when your body doesn’t have enough fluid circulating, your blood pressure can fall. Simply drinking more water throughout the day can sometimes make a big difference.

A third possibility is called orthostatic hypotension. This happens when blood pressure drops temporarily as you move from lying down or sitting to standing. Studies suggest it affects roughly 10 percent of adults 60 and over, and as many as 30 percent of people 65 and up, which helps explain why dizziness and falls become more common later in life.

As we get older, the blood vessels in our legs lose some of their elasticity. You can think of it as an old sock losing its stretchiness. When you stand up, blood can briefly pool in the legs instead of moving quickly back toward the heart and brain. The result is that familiar moment of lightheadedness.

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The solution in many cases is to put the brakes on. For instance, when you’re getting out of bed, first sit for a minute. Move your legs and let your circulation get going. Then stand up slowly, remaining near the bed or chair for a moment before walking. That pause allows your body to adjust to standing and reduces the risk of dizziness or a fall.

As I mentioned, medications can contribute to these drops in blood pressure, particularly in older adults. Diuretics, which help the body remove excessive fluid, can lower blood pressure by reducing salt levels. Calcium channel blockers relax and open blood vessels, making it easier for blood to pool in the legs when you stand. If you notice dizziness after starting or adjusting a medication, it’s worth discussing with your doctor.

There are treatments for chronic low blood pressure, but they’re rarely needed. Some people benefit from increasing their salt intake or wearing compression stockings or socks. In very specific situations, medications that raise blood pressure are prescribed, but that’s uncommon.

Most of the time, management focuses on practical steps: staying well-hydrated, rising slowly and identifying any medications that could be contributing to the problem. However, there is one situation where I always recommend a medical evaluation: repeated episodes of dizziness or fainting.

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Persistent orthostatic hypotension sometimes signals an underlying condition or a medication problem. Neurological issues such as Parkinson’s disease can affect the body’s ability to regulate blood pressure when changing positions. While that’s not the most common cause, it’s one reason why recurring symptoms should never be ignored.

The take-home message? If you feel steady and well, there’s usually nothing to treat. But if your low blood pressure leaves you lightheaded, unsteady or prone to fainting, especially as you get older, that’s your body signaling that it’s time to speak with your doctor and figure out what’s going on.

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