Caffeine Overdose: Warning Signs That You've Had Too Much

Insomnia

Caffeine can interfere with sleep, making it difficult to fall asleep and stay asleep. This is because caffeine blocks adenosine, a neurotransmitter that promotes sleepiness.

Anxiety

Caffeine can increase anxiety and nervousness, especially in people who are sensitive to its effects. This is because caffeine can overstimulate the nervous system.

Headaches

Caffeine can cause headaches, especially in people who are prone to migraines. This is because caffeine can constrict blood vessels in the brain.

Digestive problems

Caffeine can cause digestive problems such as heartburn, stomach upset, and diarrhea. This is because caffeine can stimulate the production of stomach acid.

Addiction

Caffeine is addictive, and people who consume large amounts of caffeine may experience withdrawal symptoms such as headaches, fatigue, and irritability if they suddenly stop consuming it.

High blood pressure

Caffeine can cause a temporary increase in blood pressure. However, regular caffeine consumption may increase the risk of developing high blood pressure.

Rapid heart rate

Caffeine can cause a temporary increase in heart rate. This is because caffeine stimulates the heart.

Fatigue

While caffeine can provide a temporary boost of energy, it can also lead to fatigue and crashes. This is because caffeine can deplete the body's energy stores.