What the numbers mean
A reading like 128/82 has two parts:
- Systolic (top number): the pressure in your arteries when your heart beats. It tends to rise with age as arteries stiffen, and it's the stronger predictor of risk after about 50.
- Diastolic (bottom number): the pressure between beats, while the heart refills.
Your category is set by whichever number is higher on the scale. So 128/88 counts as Stage 1, driven by the diastolic.
The categories
These are the categories used by the American Heart Association and American College of Cardiology. A diagnosis should be based on several readings on different days, not one.
| Category | Systolic | Diastolic | |
|---|---|---|---|
| Normal | Under 120 | and | Under 80 |
| Elevated | 120–129 | and | Under 80 |
| Stage 1 | 130–139 | or | 80–89 |
| Stage 2 | 140+ | or | 90+ |
| Severe | 180+ | and/or | 120+ |
Why it matters
High blood pressure rarely causes symptoms, but year after year it damages the lining of your arteries and forces your heart to work harder. It's a leading cause of:
The upside: bringing it down works. Large trials show that lowering blood pressure substantially reduces the risk of heart attack, stroke, and death, and each step down helps.
Measuring at home
Office readings are often misleading. Some people run high only at the doctor's office ("white coat" hypertension), and others read normal there but high at home ("masked" hypertension). Home monitoring gives a much truer picture, and guidelines encourage it.
Choosing a monitor
- Upper-arm cuff, not wrist or finger. Upper-arm monitors are the most reliable.
- Clinically validated. Check the U.S. Validated Device Listing at validatebp.org.
- The right cuff size. A cuff that's too small, which is common in muscular or larger men, reads falsely high. Measure your upper arm and check the cuff range.
How to take an accurate reading
- No caffeine, exercise, or smoking for 30 minutes before, and empty your bladder.
- Sit quietly for 5 minutes with your back supported, feet flat, and legs uncrossed.
- Bare arm, supported at heart level on a table. Cuff on skin, not over a sleeve.
- Don't talk during the reading.
- Take two readings a minute apart, morning and evening, for about a week, then average them. That average is what your doctor needs.
What lowers it, and by how much
Lifestyle changes are powerful, and the effects add up. These are approximate reductions in systolic pressure for people who already have high blood pressure, based on the research summarized in U.S. hypertension guidelines. Effects tend to be smaller if your pressure is already normal.
| Change | Approx. systolic drop |
|---|---|
| DASH-style eating: fruits, vegetables, whole grains, low-fat dairy, less red meat and sugar | ~11 mmHg |
| Weight loss | ~1 mmHg per kg (2.2 lb) lost |
| Regular aerobic exercise (90–150 min/week) | ~5–8 mmHg |
| Cutting sodium (ideally under 1,500 mg/day, or by at least 1,000 mg) | ~5–6 mmHg |
| More potassium from food: beans, potatoes, leafy greens, bananas, yogurt | ~4–5 mmHg |
| Isometric exercise such as wall sits and handgrip holds | ~5 mmHg |
| Resistance training | ~4 mmHg |
| Limiting alcohol to 2 drinks/day or fewer, ideally less | ~4 mmHg |
Other things that help: treating sleep apnea, which is a very common hidden driver of high blood pressure, getting enough sleep, and quitting smoking or nicotine.
About sodium: most of it comes from restaurant food, bread, deli meat, pizza, soups, and packaged foods, not the salt shaker. Salt substitutes (potassium chloride) can help, but check with your doctor first if you have kidney disease or take ACE inhibitors, ARBs, or potassium-sparing diuretics.
Medications
If lifestyle changes aren't enough, or your pressure is in Stage 2, medication is standard. It's not a failure. Many people need it, especially as they age, and most modern blood pressure drugs are inexpensive, generic, and well tolerated. Many people end up on two drugs at low doses, which often works better with fewer side effects than one at a high dose.
| Class | Examples | Worth knowing |
|---|---|---|
| ACE inhibitors | Lisinopril, ramipril | First-line. A dry cough is a common side effect. |
| ARBs | Losartan, valsartan, telmisartan | First-line. Similar to ACE inhibitors without the cough. Neutral or possibly favorable for erections. |
| Calcium channel blockers | Amlodipine | First-line. Ankle swelling is common at higher doses. |
| Thiazide-type diuretics | Chlorthalidone, hydrochlorothiazide | First-line. Requires monitoring of potassium and sodium. Linked to erectile problems in some men. |
| Beta blockers | Metoprolol, carvedilol | Not first-line for uncomplicated high blood pressure, but important after a heart attack or with some heart conditions. Older ones are linked to fatigue and ED. |
Blood pressure treatment only works if you take it. If a medication gives you side effects, including sexual ones, tell your doctor. There are almost always alternatives. Don't just stop.
Blood pressure & erections
High blood pressure and erectile dysfunction are closely connected. Damaged arteries restrict blood flow to the penis, and ED is often one of the earliest visible signs of vascular disease, sometimes years before heart symptoms.
- Treat the blood pressure and discuss options if ED starts after a new medication. ARBs are often a good choice for men who are concerned.
- ED medications (sildenafil, tadalafil) are generally safe with most blood pressure drugs, but they can cause a bigger drop in pressure when combined with alpha-blockers (like doxazosin, sometimes used for the prostate).
TRT & blood pressure
Testosterone therapy can raise blood pressure in some men, and all testosterone products carry label warnings about it. The FDA-approved oral testosterone capsules carry a boxed warning on this specific risk. TRT also raises red blood cell counts (hematocrit), which thickens the blood.
If you're on TRT, or considering it:
- Get your blood pressure under control before starting, and check it at home periodically once you're on treatment.
- Make sure your provider monitors hematocrit on follow-up labs.
- Be skeptical of any clinic that doesn't ask about your blood pressure and heart history before prescribing. Compare TRT providers →