A blood pressure of 143/83 mmHg is high. It falls into Stage 2 hypertension, the more serious of the two high blood pressure categories, because the top number (systolic) is 140 or above. At this level, current guidelines recommend both medication and lifestyle changes.
Where 143/83 Falls on the Scale
Blood pressure readings are split into categories based on two numbers: systolic (the pressure when your heart beats) and diastolic (the pressure between beats). The American Heart Association defines the ranges as follows:
- Normal: below 120/80
- Elevated: 120–129 systolic and below 80 diastolic
- Stage 1 hypertension: 130–139 systolic or 80–89 diastolic
- Stage 2 hypertension: 140 or higher systolic, or 90 or higher diastolic
Your systolic reading of 143 pushes you into Stage 2 territory. The diastolic number of 83, on its own, would only qualify as Stage 1. But blood pressure classification is based on whichever number falls into the higher category, so the 143 is what determines your overall classification.
Why the Top Number Matters Most Here
A pattern where the systolic number is elevated while the diastolic stays relatively lower is called isolated systolic hypertension. It becomes increasingly common with age as arteries stiffen and lose flexibility. The National Institute on Aging notes that in older adults, it’s typical for the top number to climb above 130 while the bottom number stays below 80.
This pattern is not less dangerous just because one number looks reasonable. Research has linked isolated systolic hypertension with a higher risk of heart attack, stroke, chronic kidney disease, and death from cardiovascular disease. Over time, unmanaged high systolic pressure can lead to hypertensive heart disease, a group of problems caused by the heart working harder than it should for too long.
One Reading Doesn’t Equal a Diagnosis
A single reading of 143/83 is a signal to pay attention, but it’s not enough to confirm a diagnosis. Blood pressure fluctuates throughout the day based on stress, caffeine, physical activity, and even a full bladder. Current clinical guidelines recommend basing decisions on the average of multiple readings taken over several days.
The standard approach is to take two readings about a minute apart, both morning and evening, for at least three days. Seven days is preferred. Those results are then averaged to get a reliable picture of your true blood pressure. If your average across those readings still lands at 140/90 or above, the diagnosis of Stage 2 hypertension is more certain. If several of your home readings come back in the 120s or low 130s, that single 143 reading may have been a temporary spike.
How to Get an Accurate Home Reading
The way you take your blood pressure at home makes a real difference in the number you see. The CDC recommends a few steps to avoid falsely high readings:
- Empty your bladder before measuring. A full bladder can raise your reading.
- Sit quietly for five minutes with your back supported before taking a reading. Don’t measure right after walking up stairs or rushing around.
- Position your arm correctly. Rest it on a table so the cuff sits at chest height. Letting your arm hang at your side or holding it up can skew the numbers.
Take two readings about a minute apart each time and record both. Most home monitors store your results, which makes it easier to share a full log with your doctor rather than relying on memory.
What Treatment Looks Like at This Level
The 2025 AHA/ACC guideline is clear: for adults with an average blood pressure of 140/90 or higher, medication is recommended alongside lifestyle changes. You don’t need to try lifestyle modifications alone first at this threshold. That “try lifestyle first” approach is reserved for people in the 130–139 range who have lower overall cardiovascular risk, where doctors typically allow three to six months of lifestyle changes before considering medication.
At 143/83, however, the combination of medication and behavior changes is the standard recommendation. For people who also have diabetes, kidney disease, existing heart disease, or a previous stroke, treatment is even more aggressive, with medication recommended at 130/80 or above.
Lifestyle Changes That Lower Blood Pressure
Medication works faster, but lifestyle changes can meaningfully reduce your numbers and sometimes allow for lower doses over time. The two with the strongest evidence are exercise and sodium reduction.
For exercise, the target is at least 30 minutes of moderate physical activity every day. That means brisk walking, cycling, swimming, or anything that gets your heart rate up without leaving you gasping. Consistency matters more than intensity. Regular aerobic exercise can lower systolic blood pressure by several points on its own.
For sodium, the general limit is 2,300 milligrams per day, roughly one teaspoon of table salt. But for most adults with high blood pressure, aiming for 1,500 milligrams or less provides a greater benefit. Most excess sodium comes from processed and restaurant food rather than the salt shaker, so reading nutrition labels and cooking at home more often are the most practical ways to cut back.
Weight loss, reducing alcohol intake, and eating more fruits, vegetables, and whole grains also contribute to lower readings. None of these replace medication when your numbers are in Stage 2 range, but they work together with it.
What to Expect Going Forward
If your doctor starts you on blood pressure medication, you’ll likely have a follow-up within a few weeks to see how your numbers respond. The goal for most adults is to bring blood pressure below 130/80. A large NIH-funded trial called SPRINT found that targeting a systolic pressure below 120 in adults 50 and older significantly reduced cardiovascular events and death, though that aggressive target involves tradeoffs your doctor will discuss based on your age and overall health.
One thing worth knowing: when treating high systolic pressure, doctors also watch to make sure the diastolic number doesn’t drop too low. A diastolic reading that falls well below normal can mean your organs aren’t getting enough blood flow between heartbeats. At 83, your diastolic pressure has plenty of room, but it’s something that gets monitored as treatment progresses.
Blood pressure management is ongoing. The reading you saw at 143/83 is a useful starting point, not a life sentence. Most people who combine medication with consistent lifestyle changes see their numbers improve within weeks to months.