A blood pressure of 145/90 is high. It falls into Stage 2 hypertension, the most serious category in the current classification system used by the American Heart Association and American College of Cardiology. Stage 2 begins at 140/90 or higher, and at this level, medication is typically recommended alongside lifestyle changes.
Where 145/90 Falls in the Blood Pressure Categories
The 2025 AHA/ACC guidelines break blood pressure into four categories:
- Normal: below 120/80
- Elevated: 120 to 129 systolic and below 80 diastolic
- Stage 1 hypertension: 130 to 139 systolic or 80 to 89 diastolic
- Stage 2 hypertension: 140 or higher systolic, or 90 or higher diastolic
At 145/90, both numbers independently qualify for Stage 2. The top number (systolic) measures pressure when your heart pumps, while the bottom number (diastolic) measures pressure between beats. If either number crosses into a higher category, the higher category applies. In your case, both are over the line.
For people over 50, the systolic number carries more weight for predicting heart disease risk. As arteries stiffen with age and plaque builds up, systolic pressure tends to rise. A systolic reading of 145 is worth paying attention to regardless of the bottom number.
One Reading vs. an Actual Diagnosis
A single reading of 145/90 doesn’t automatically mean you have hypertension. Blood pressure fluctuates throughout the day based on stress, caffeine, activity, and even the anxiety of sitting in a doctor’s office. A diagnosis is based on your average across multiple readings, usually taken on at least two separate occasions.
Home monitoring adds another layer of nuance. Blood pressure measured at home tends to run a bit lower than in a clinic. The home equivalent of a clinic reading of 140/90 is roughly 135/85. So if you’re getting 145/90 consistently at home, where you’re presumably more relaxed, that’s a stronger signal than getting the same number during a stressful office visit. If you’re checking at home, use a validated upper-arm cuff, sit quietly for five minutes first, and take two readings a minute apart. The average of those readings over several days gives you the most reliable picture.
What Happens at This Level
The 2025 guidelines are straightforward about 145/90: medication is recommended for all adults with an average blood pressure at or above 140/90, in addition to lifestyle changes. This is a shift from earlier approaches that sometimes waited to see if lifestyle changes alone would do enough at this level. At Stage 2, the combination of both is now the standard starting point.
For comparison, people with lower readings in the Stage 1 range (130 to 139 systolic or 80 to 89 diastolic) have a longer decision tree. Whether they start medication depends on factors like existing heart disease, diabetes, kidney disease, or their estimated 10-year cardiovascular risk. At 140/90 and above, those risk calculations still matter for the overall treatment plan, but the recommendation for medication applies broadly.
Lifestyle Changes That Move the Numbers
Even when medication is part of the plan, lifestyle changes can meaningfully lower blood pressure on their own, sometimes enough to reduce the dose you need over time. The numbers here are surprisingly concrete.
Diet makes the biggest single impact. An eating pattern rich in fruits, vegetables, whole grains, and low-fat dairy while cutting back on saturated fat can lower blood pressure by up to 11 points systolic. The DASH diet and Mediterranean diet are the two most studied versions of this approach. Separately, increasing potassium intake to 3,500 to 5,000 mg per day (through foods like bananas, potatoes, spinach, and beans) can drop blood pressure another 4 to 5 points by counteracting sodium’s effects.
Cutting sodium matters too. Most adults do best limiting sodium to 1,500 mg per day, which can lower blood pressure by 5 to 6 points. The biggest source of sodium for most people isn’t the salt shaker; it’s processed and packaged foods. Reading labels and cooking more at home are the two most practical changes.
Regular exercise, specifically 30 minutes of moderate aerobic activity most days, lowers blood pressure by about 5 to 8 points. Walking, cycling, swimming, and dancing all count. Strength training at least twice a week adds additional benefit.
Weight loss helps if you’re carrying extra pounds. Blood pressure drops roughly 1 point for every kilogram (about 2.2 pounds) lost. Even modest weight loss of 10 to 15 pounds can bring a reading like 145/90 noticeably closer to normal range.
Putting the Numbers in Perspective
If you’re seeing 145/90 for the first time, it’s not an emergency, but it’s not something to ignore. A reading in this range sustained over time increases your risk of heart attack, stroke, kidney damage, and vision problems. The good news is that blood pressure responds well to treatment. Most people who combine medication with lifestyle adjustments bring their numbers into a healthier range within weeks to months.
The gap between 145/90 and a normal reading below 120/80 is 25 points systolic. That might seem like a lot, but stacking the lifestyle changes described above can close most or all of that gap. Diet alone can account for 11 points, sodium reduction another 5 to 6, exercise another 5 to 8, and weight loss varies depending on how much you have to lose. These effects are additive, though they don’t always add up perfectly in practice.
If you’ve measured 145/90 at home on multiple occasions or received this reading at a clinic visit, the next step is confirming it with your doctor through repeated measurements. From there, you’ll likely discuss both medication and the specific lifestyle changes that fit your situation.