There has been a tenfold increase in emergency room visits related to energy products in the last few years. The problem of chugging Red Bull, Rockstar, Monster Energy, 5-Hour Energy and many others is overconsumption of caffeine. Some products contain herbal sources of caffeine, as well.Product Mg of Caffeine per bottle (oz)Monster Energy Drink 160 mg 16 ozRed Bull 80 mg 8.4 oz5-Hour Energy Drink 138 mg 2 ozRockstar 2x Energy Drink 250 mg 12 ozRockstar Punched Guave 330 mg 22 ozCoffee, brewed 108 mg 8 ozPepsi, diet 36 mg 12 ozExcessive doses of caffeine have been associated with anxiety, insomnia, jitteriness, dizziness, irritability and heart irregularities, at times leading to death.Use caffeine in moderation. It is usually recommended not to consume more than 400-500 mg of caffeine per day. Don't combine caffeine and alcohol. Stimulants can mask alcohol's effects leading to over drinking and drunk driving.Dr. Mohler has practiced family medicine in Grand Junction for 38 years. He has a particular interest in pharmaceutical education. Phil works part-time for both Primary Care Partners and Rocky Mountain Health Plans.