Caffeine is an addictive psychoactive substance. Spontaneous abortion and low birthweight babies have occurred in pregnant women consuming 150 mg caffeine per day. Abuse can lead to cardiac damage or death.

See also separate profile for guarana.

Common symptoms of caffeine withdrawal are headache; drowsiness; yawning, impaired concentration; lassitude; irritability; decreased contentedness, well-being and self-confidence; decreased sociability; flu-like symptoms; muscle aches and stiffness; hot or cold spells; nausea or vomiting; and blurred vision.

Cafcit is caffeine citrate.