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.

Caffeine & Anxiety

Published Jul,08 2011 | By Marnie Kunz

Anxiety is feelings of worry and nervousness, and in intense forms, anxiety can manifest in a group of disorders called anxiety disorders. Caffeine is a stimulant that increases heart rate and can lead to nervousness and agitation, increasing anxiety levels.

Marnie Kunz has been an award-winning writer covering fitness, pets, lifestyle, entertainment and health since 2003. Her articles have been published in "The Atlanta Journal-Constitution," "Alive," "The Marietta Daily Journal" and other publications. Kunz holds a Bachelor of Arts in creative writing from Knox College and is a Road Runners Club of America-certified running coach and a certified pole dance instructor.