None 100% of time: The caffeine and stimulation can cause heart rhythm problems and some associated deaths have occurred. The vitamins are urinated out if in excess, so do not really 'hurt' the brain. Should never exceed TWO in a day for safety -- and to avoid bankruptcy!
Answered 8/15/2014
3.9k views
Many: It ranges from hyperactivity, hyperexcitability, irritability, insomnia and mood swings and don't forget about the arrhythmias you may develop
Answered 7/5/2014
3.9k views
Energy drinks: Energy drinks contain sugar and caffeine that are stimulants to the nervous system. Excessive amounts can cause headaches, dizziness, nervousness, and insomnia. Seizures have been reported with the use of energy drinks but this is a rare event.
Answered 7/6/2014
3.9k views
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question