Caffeine consumption may cause a slight and temporary increase in blood pressure, and when stopping it, this increase related to its consumption disappears, but the long-term effect of abstaining from caffeine on blood pressure is not simple, as it depends on the body's tolerance to caffeine, baseline blood pressure level, source of caffeine, and other individual factors.

Reducing caffeine may limit temporary blood pressure spikes, because due to its stimulant effect, caffeine can raise blood pressure for a short period.

Therefore, it may seem logical that avoiding coffee or any other source of caffeine would also avoid this increase, but the effect varies from person to person.

Typically, caffeine causes a slight and temporary increase in blood pressure that may last between one and a half to nine and a half hours after consumption.

The magnitude of this increase is influenced by several factors, including:

Frequency of caffeine consumption.

Blood pressure level before consumption.

Body weight.

Use of oral contraceptives.

Smoking.

Pregnancy.

Therefore, it cannot be definitively stated that stopping caffeine will affect blood pressure in the same way for everyone.

Caffeine Tolerance Alters Its Effect on Blood Pressure

Regular coffee drinking may lead to developing some tolerance to caffeine, including its effect on blood pressure. This means that coffee may raise blood pressure less in regular drinkers compared to those who do not usually consume it.

In a study involving 77 healthy adults, systolic blood pressure increased in participants who did not usually drink coffee after consuming espresso, while no similar effect was seen in regular coffee drinkers.

It remains unclear whether this is due to developing caffeine tolerance or because regular consumption raised their baseline blood pressure. Experts also continue to debate whether caffeine only temporarily raises blood pressure or can affect it in the long term.

Therefore, there is currently insufficient evidence to confirm that abstaining from coffee will lower blood pressure in those who drink it regularly.

Caffeine and Severe High Blood Pressure

Reducing or stopping caffeine may be beneficial for people with severe high blood pressure.

A large study followed the health habits of 18,609 people over nearly 19 years. It found that those with stage 2 or stage 3 high blood pressure who drank two or more cups of coffee daily were more than twice as likely to die from stroke, heart attack, or cardiovascular disease compared to those who drank one cup or less per day.

Since strokes and heart attacks are linked to high blood pressure, the temporary increase caused by caffeine may have pushed pressure to dangerous levels in some participants.

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How Does Caffeine Withdrawal Affect Blood Pressure?

Suddenly stopping caffeine can lead to withdrawal symptoms as the body adapts to its absence. These symptoms usually begin within 12 to 24 hours after the last dose and may include fatigue, headache, difficulty concentrating, mood disturbances, and nausea.

There is no consistent pattern proving that blood pressure rises or falls during the caffeine withdrawal phase.

However, people with a history of high blood pressure are advised to consult a healthcare provider, as some withdrawal symptoms, such as headache and fatigue, may resemble symptoms of high blood pressure.

Gradually reducing caffeine, rather than stopping abruptly, may help alleviate withdrawal symptoms. Getting adequate rest, drinking water, and using over-the-counter pain relievers when needed may also be beneficial.