Why Does Coffee Make Me Sleepy?

Although coffee is a stimulant, some people may feel sleepy after drinking it. Regular caffeine use can lead to adaptation, making its effects on alertness less noticeable over time.

Sleep deprivation, accumulated sleep pressure, or the effects of caffeine wearing off can also contribute to sleepiness. Caffeine works partly by blocking adenosine, a chemical involved in promoting sleepiness, and regular use can cause the brain to adapt to this effect. Individual responses vary, so some people may feel more alert while others may still feel tired after coffee.

For general information only; not medical advice. Consult a healthcare professional for individual concerns.