How long does a cup of coffee keep you awake?
Caffeine is a familiar drug that stimulates the nervous system. When it enters the body, caffeine raises the heart rate and blood pressure, increasing energy levels and improving the mood.
Caffeine acts quickly, and many people notice the effects within minutes. They last until the body fully metabolizes the drug. This duration depends on several factors.
Each person will feel the effects differently, and some may last longer than others. People who are pregnant or have difficulty sleeping should be careful about timing their caffeine intake and may want to avoid it altogether.