What are the Side-Effects of Caffeine?

TL;DR: Use caffeine carefully if you have any disorder or condition. 

People with Anxiety Disorders: Can make your conditions worse.  Use with caution.

People who are Bipolar: Can make your conditions worse.  Use with caution in low amounts.

People who have Bleeding Disorders: Caffeine may agitate your disorder.  Use with caution.

People who have Heart Conditions: May cause irregular heartbeat.  Use with caution.

People who have Diabetes: May affect the way your body uses sugar.  Use with caution.

("Caffeine", n.d.).