Why do I feel dizzy and anxious after drinking coffee?

Causes of dizziness after drinking coffee

Drinking coffee is a way for many people to refresh themselves in the morning, but some people will experience symptoms of palpitations and dizziness after drinking coffee. This situation may be caused by the following reasons.

1. Caffeine allergy

Some people are allergic to caffeine, and even a small amount of caffeine can cause an uncomfortable reaction. When the body is exposed to allergens, the immune system releases a large amount of substances such as histamine, which leads to symptoms such as vasodilation, decreased blood pressure, and increased heart rate. These physiological changes may cause palpitations and dizziness.

2. Excessive caffeine intake

Another common cause is excessive caffeine intake. Although everyone has different tolerance levels to caffeine, doses that exceed individual tolerance may cause adverse reactions. Large doses of caffeine can stimulate the central nervous system and increase adrenaline secretion, leading to faster heartbeat and higher blood pressure, which in turn can cause palpitations and dizziness.

3. Caffeine affects drug metabolism

The caffeine in coffee can interfere with the metabolism of certain drugs. For example, some anti-anxiety or antidepressant drugs need to be metabolized and cleared from the body through the liver enzyme system. Caffeine can increase the activity of these enzymes, causing the drugs to be broken down and excreted from the body more quickly. If such drugs are taken at the same time as a large amount of coffee, the drug concentration in the blood may decrease, causing symptoms to worsen.

4. Caffeine withdrawal symptoms

For people who have been dependent on caffeine for a long time, withdrawal symptoms may occur after stopping caffeine intake. These withdrawal reactions include headaches, anxiety, palpitations and other discomforts. When the body gradually adapts to the daily fixed amount of caffeine, suddenly stopping intake will disrupt the balance of the nervous system and cause the above discomfort reactions.

5. Other reasons

In addition to the above common reasons, there are other factors that may cause palpitations and dizziness. For example, the acid in coffee may irritate the gastric mucosa, causing increased gastric acid secretion and indigestion; or other ingredients in coffee may have adverse reactions on individuals.

In short, if you experience palpitations and dizziness after drinking coffee, you can consider the above reasons and make adjustments according to your own situation. If the symptoms persist or affect your daily life, please seek medical advice in time.