Can Chamomile Tea Cause High Blood Pressure? | What Might Raise It

Plain chamomile tea doesn’t usually raise blood pressure; when numbers climb after a cup, blends, add-ins, or meds are often the real reason.

You sip chamomile to wind down, then you notice a higher blood pressure reading later. It’s a fair question. Blood pressure can swing during the day, and it’s easy to connect the change to the last thing you had.

Most plain chamomile tea (made from chamomile flowers and hot water) isn’t known for pushing blood pressure up. Many people even drink it because it feels calming. So why do some people see higher numbers after “chamomile tea”?

This article breaks it down in plain terms: what high blood pressure means, what chamomile does and doesn’t do, and the common hidden causes that can make it look like chamomile is the trigger.

What “High Blood Pressure” Means In Real Numbers

Before blaming a drink, it helps to define what you’re seeing. Blood pressure is recorded as two numbers: systolic over diastolic. One reading is a snapshot, not a diagnosis.

Many clinics use categories like normal, elevated, and stage 1 or stage 2 hypertension. The cutoffs can vary by guideline, yet a common reference is the American Heart Association chart for understanding blood pressure readings. Understanding Blood Pressure Readings lays out those ranges.

If you took one high reading after tea, it may reflect timing, stress, cuff fit, recent activity, or even a salty meal. If your readings run high across many days, that’s the pattern worth acting on.

What Chamomile Tea Is And What’s In It

Chamomile tea is usually made from dried flowers. It’s naturally caffeine-free when it’s truly chamomile on its own. That matters because caffeine can bump blood pressure for some people, while chamomile itself isn’t a caffeine source.

There are two main “chamomiles” you’ll see on labels: German chamomile (Matricaria recutita) and Roman chamomile (Chamaemelum nobile). Both show up in teas, extracts, and topical products. The label may just say “chamomile,” so it helps to look for the Latin name if you’re tracking reactions.

Safety-wise, chamomile in tea amounts is often described as well-tolerated for most adults, with allergy risk in people sensitive to plants in the daisy family. The National Center for Complementary and Integrative Health sums up known safety points and interactions on its chamomile page. Chamomile: Usefulness and Safety is a solid baseline reference.

Can Chamomile Tea Cause High Blood Pressure? What The Evidence Suggests

For plain chamomile tea, a direct “it raises blood pressure” effect isn’t the usual story. If anything, the herb is more often discussed in the context of relaxation, sleep, and mild digestive comfort, not hypertension.

When someone sees higher blood pressure after drinking chamomile tea, the more likely explanations tend to be:

• The “chamomile tea” wasn’t plain chamomile (it was a blend with other herbs).
• Add-ins changed the picture (sugar, salty snacks, or a heavy meal with the tea).
• A medication interaction changed how you felt or how you measured.
• The reading was taken at a time when blood pressure often runs higher (pain, stress, poor sleep, rushing around).
• The monitor setup was off (cuff size, arm position, no rest period).

So the practical answer is this: chamomile tea alone isn’t a common cause of high blood pressure, yet the full “cup scenario” can still line up with higher readings.

Hidden Reasons Blood Pressure Can Rise After “Chamomile Tea”

Tea Blends That Sneak In Blood Pressure Triggers

Many tea bags that say “chamomile” are blends. They may include black tea, green tea, yerba mate, guarana, or other ingredients that carry caffeine. Even a modest caffeine dose can raise blood pressure in some people for a window of time.

Another common wildcard is licorice root. Licorice can raise blood pressure in a way that catches people off guard. If your tea is labeled “calming” or “sleep,” it can still include herbs you didn’t expect. If you’re tracking blood pressure, start by checking the ingredient list and avoid blends when you’re testing a cause-and-effect question.

Sweeteners And Snacks That Change The Reading

People often drink chamomile with dessert, honey, or a packaged snack. The tea gets blamed, while the pairing did the work.

Salt-heavy foods can raise blood pressure for many people, and sugar spikes can leave you feeling keyed up, which can push readings up too. If you want a clean test, drink plain chamomile and don’t pair it with a snack for an hour or two.

Timing And Measurement Drift

Blood pressure is sensitive to timing. A reading taken right after climbing stairs, taking a hot shower, arguing, rushing, or even talking during the measurement can run higher than your quiet baseline.

Try this pattern when you’re comparing: sit still for five minutes, feet flat, back supported, arm at heart level, and take two readings one minute apart. Use the average of the two readings as your “moment” number.

Stress, Sleep Debt, And Pain

Chamomile often shows up at the end of a long day. That end-of-day window can also be when stress, headache, body aches, or poor sleep catch up with you. Those factors can lift blood pressure on their own.

If you’re seeing a repeated pattern of higher evening readings, track the full context: sleep quality, alcohol intake, pain, hydration, and sodium that day. The tea may be the only consistent habit, yet not the actual driver.

Allergic Reactions Or Sensitivity Responses

Chamomile can trigger allergic reactions in some people, especially those with sensitivity to ragweed and related plants. In a true allergy event, symptoms can include itching, hives, swelling, wheeze, or a tight throat. A body under allergic stress can show higher heart rate and higher blood pressure during the episode.

Regulatory monographs for chamomile also describe hypersensitivity reactions, including severe reactions, as a known risk in susceptible people. The European Medicines Agency monograph for Matricaria recutita lists these as undesirable effects. EU Herbal Monograph On Matricaria recutita L., flos

If you’ve ever reacted to chamomile, don’t “test” it again by yourself. Treat it like an allergy risk, not a curiosity.

When Medication And Herbs Collide

Herbs can interact with prescription meds, and “tea” still counts as an herb exposure. For many people, the issue isn’t blood pressure rising from chamomile. It’s a mismatch between chamomile and a medication routine, leading to symptoms that change how you measure or how you feel.

Mayo Clinic’s consumer guidance on herbal supplements and heart medicines flags that herb–medicine interactions can occur with drugs used for blood pressure and other cardiovascular conditions. Herbal supplements and heart medicines may not mix

Chamomile is often mentioned in the context of interactions and bleeding risk when paired with anticoagulants. That’s not a blood pressure effect, yet it’s still a reason to be careful if you take blood thinners or are scheduled for a procedure.

If you take blood pressure medication, a calming tea at night can still change the picture if it makes you sleepy and you stand up quickly, feel dizzy, or measure at unusual times. That can lead to confusing readings and mixed signals.

How To Tell If Chamomile Is Actually The Trigger

You don’t need guesswork. You need a clean comparison.

Run A Simple Two-Week Check

• Pick one plain chamomile tea with a single ingredient (no blends).
• Drink it at the same time each day, with no snack for 90 minutes on both sides.
• Measure blood pressure the same way each time: seated, rested, quiet.
• On four days, swap the chamomile tea for warm water at the same time, same routine.
• Compare averages, not single spikes.

If your readings are higher on chamomile days by a consistent margin, that’s a clue. If the numbers bounce around on all days, the driver is more likely stress, sodium, sleep, measurement drift, or meds timing.

Watch For The “Blend Trap”

If the effect shows up only with certain brands, inspect the label. “Natural flavors” and multi-herb blends can hide the difference. Switch to a single-ingredient chamomile and see if the pattern holds.

Don’t Ignore Symptoms

Blood pressure is one data point. Symptoms can signal that something else is happening, like an allergy or a medication interaction. If you get wheeze, swelling, rash, or faintness after chamomile, stop using it and seek care.

What Happened After Tea	Common Non-Tea Cause	Fast Check
Blood pressure higher within 30–90 minutes	Caffeine from a “chamomile” blend	Check label for black/green tea, mate, guarana; switch to single-ingredient chamomile
Higher reading after a cozy evening routine	Salty snack or heavy meal paired with tea	Repeat with plain tea and no snack; track sodium that day
Higher reading on the first measurement	No rest period, talking, arm position off	Sit five minutes; take two readings one minute apart; average them
Higher evening readings across many days	Stress, pain, poor sleep	Track sleep, pain level, alcohol, and stress rating for two weeks
Racing heart plus higher blood pressure	Anxiety episode or stimulant exposure	Check caffeine, decongestants, nicotine; log timing
Swelling, rash, wheeze, throat tightness	Allergic reaction to chamomile	Stop use; seek urgent care for breathing or swelling symptoms
Odd readings after med changes	Medication timing or interaction effects	Keep a med-and-tea log; ask a pharmacist about herb interactions
Higher readings only with one “calming” blend	Licorice root or another raising ingredient	Scan ingredients for licorice; avoid that blend

Who Should Be Extra Careful With Chamomile Tea

Many adults drink chamomile tea with no issues. Still, some groups should take a more careful approach because the risk is less about blood pressure and more about reactions or interactions.

People With Plant Allergies

If you react to ragweed, daisies, marigolds, or chrysanthemums, chamomile can be a problem. An allergic reaction can feel like “my body is revved up,” and your blood pressure can rise during the episode.

People On Blood Thinners Or Antiplatelet Drugs

Chamomile is often flagged for possible interaction concerns with anticoagulants. If you take warfarin or similar meds, don’t add daily chamomile without running it by the clinician managing that prescription.

People Taking Sedatives Or Sleep Meds

Chamomile can make some people drowsy. If you stack it with a sedating medication, you may feel more woozy. That doesn’t mean blood pressure is high, yet it can lead to confusing readings or an unsafe stumble when you stand up.

Pregnancy And Breastfeeding

Herb safety in pregnancy is often unclear. If you’re pregnant or breastfeeding and you drink chamomile often, talk with your OB team about it, especially if the product is concentrated or marketed as “extra strength.”

What To Do If You See A High Reading After Tea

First, don’t panic. Repeat the measurement the right way. If the second reading drops, the first one was likely a technique issue or a short-lived stress bump.

If your reading is in a crisis range or you have red-flag symptoms like chest pain, shortness of breath, one-sided weakness, or trouble speaking, treat it as urgent and seek emergency care.

If your readings are elevated across many days, treat it as a blood pressure pattern issue. That’s bigger than any single tea. Use home monitoring, keep a log, and bring the log to your next appointment.

Scenario	What It Can Mean	Next Step
One high reading, next reading normal	Technique drift or short stress bump	Measure seated and rested; keep a simple log for a week
Higher readings only with one tea brand	Blend ingredient issue	Switch to single-ingredient chamomile; re-check pattern
Higher readings on days with salty foods	Sodium sensitivity	Track sodium and evening readings; compare low-sodium days
Higher readings with jittery feeling	Caffeine, stimulant, or stress	Check caffeine sources and decongestants; measure after quiet rest
High reading plus rash, swelling, or wheeze	Allergic reaction	Stop chamomile; seek urgent care for breathing or swelling symptoms
High readings across many days	Ongoing hypertension pattern	Home monitoring and clinician review; bring your log

A Practical Takeaway You Can Use Tonight

If you want chamomile tea and you’re watching blood pressure, keep it simple: single-ingredient chamomile, no blend, no snack, and measure only after you’ve been seated and quiet.

If your numbers still climb in a steady pattern after that clean setup, the tea may be part of your personal trigger set, or it may be an interaction with meds timing. In that case, it’s worth bringing your log to a pharmacist or prescribing clinician so they can scan for interaction risks and help you pick a safer routine.