What side effects may I notice from receiving Caffeine?

Side effects that you should report to your doctor or health care professional as soon as possible:
-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-bloody, dark stools
-breathing problems
-confused, irritable
-fast, irregular heartbeat
-fever
-infection
-loss of appetite
-seizure
-trembling
-trouble passing urine
-trouble sleeping
-unusual bleeding or bruising
-vomiting

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
-dry skin
-frequent passing of urine

This list may not describe all possible side effects for Caffeine. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.