Caffeine Effects: Withdrawal, Sleep & Health Impact

Caffeine impacts everything from sleep quality to concentration and heart rate. Learn how long withdrawal takes, the diuretic effects on the body, and the potential risks of taking caffeine tablets with medication or alcohol.

high angle view of hands holding a cup of coffee

The Effect of Caffeine on Heart Rate

Published Jul,08 2011 | By Kim Nunley

Caffeine is a widely used psychoactive drug found in many drinks, such as coffee, tea and cola. Caffeine is naturally present in the leaves and seeds of a variety of plants. Consuming caffeine has significant physiological effects on your body--one being its direct effect on your heart rate.

Kim Nunley has been screenwriting and working as an online health and fitness writer since 2005. She’s had multiple short screenplays produced and her feature scripts have placed at the Austin Film Festival. Prior to writing full-time, she worked as a strength coach, athletic coach and college instructor. She holds a master's degree in kinesiology from California State University, Fullerton.