What causes dizziness and nausea after drinking green tea?

Generally, dizziness and nausea after drinking green tea may be caused by factors such as medication interactions, overly strong tea, or underlying medical conditions. Appropriate measures should be taken based on the specific cause.

1. Medication factors: If medications are taken while drinking green tea, symptoms such as dizziness and nausea may occur. Green tea contains components like polyphenols that may interact with certain ingredients in medications, causing side effects. Tea should generally not be consumed together with medication, as it may affect both health and drug efficacy.

2. Overly strong tea: Tea contains caffeine, theophylline, and tea polyphenols, which can dilate blood vessels and increase nervous system excitability. If the tea is too strong or a large amount of green tea is consumed at once, it may overstimulate the brain or nerves, leading to blood vessel constriction and symptoms such as rapid heartbeat, dizziness, and nausea. It is advisable to avoid drinking tea that is too strong or consuming excessive amounts at one time.

3. Underlying medical conditions: Individuals with conditions such as hypertension or hyperlipidemia may experience dizziness and nausea after drinking green tea, especially if their blood pressure or lipid levels are poorly controlled. In such cases, active treatment of the underlying condition is necessary. Once the primary disease is under control, symptoms like dizziness and nausea typically improve.