Dec 11, 2025
3 min read
Drinking too many energy drinks a day can have serious risks for your brain.Doctors at Nottingham University Hospitals' stroke unit have warned...
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The patient had left-sided hemiparesis, difficulty walking and speech problems: ataxia, which immediately alerted the clinical team.After pharmacological pressure reduction, the condition only partially improved (systolic pressure dropped to 170 mmHg).
Restoration of various events
The key points emerged with a clearer note.The man reported that he drank an average of eight energy drinks a day containing about 160 milligrams of caffeine, with a total dose of between 1,200 and 1,300 milligrams, higher than the maximum 400 milligrams per day.He was asked to stop taking them and his blood pressure returned to normal, allowing the medication to be stopped.But the consequences of this nervous system have not completely disappeared: "Obviously, I was not aware of the risks they caused me to take."The patient explained that the tonic: I was still numb in my left hand, fingers, toes and toes, even after eight years.
Little awareness of risk
The authors note that the lack of awareness of patients is "perhaps not surprising" because energy drinks "are not usually considered to have a possible cardiovascular risk." "The average content declares a content of about 80 mg of caffeine per 250 ml to 30 mg and in coffee, 90 mg. But in some cases, it can contain more than 500 mg per serving," he emphasized."
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A phenomenon that mainly affects young people
The British case described by the BMJ is not isolated.In the United States and Europe, emergency services have for years recorded an increase in care related to the consumption of energy drinks, especially among teenagers and young adults.In the UK, the authors note, in 2018 the main supermarkets introduced a voluntary ban on sales to children under 16 years of age.
In Italy this phenomenon is increasing: According to the Institute of Health (Hbsc/Hbsc) 35% of teenagers.Facts about Italian cartridges, also because these drinks are usually associated with alcohol in an alcoholic way, causing their cardiovascular effects.
Why can an energy drink be dangerous?
Caffeine stimulates the nervous system, increasing heart rate and blood pressure.Combination with sugars with a high glycemic index leads to insulin spikes and a higher metabolic load.And finally, ingredients like taurine — which is considered protective in other conditions — can alter the heart's contractions in high doses and in combination with caffeine.According to a meta-analysis in the European Journal of Preventive Cardiology (2023), caffeine intake greater than 400 mg may increase the risk of arrhythmias in predisposed individuals.And hypertension and untreated arrhythmias are known to be major risk factors for ischemic and hemorrhagic stroke.
Strict rules are needed
Although this is an isolated case, doctors have not concluded: "Although the evidence is not limited, given the possible risk of addiction and the advertising campaign of energy drinks is useful for the future of public health." In Italy, several scientific societies - including the Federation of Pediatricians (SIP) - have been calling for sales limits for children, white labels and information campaigns for some time.
