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"  Reader Question: I have trouble waking up in the morning and always need several cups of coffee. I&amp;#039;ve been thinking about trying an energy drink to see if it works better. Are these safe? I agree that there&amp;#039;s nothing like a cup of coffee in the morning to get the day started. Caffeine pumps you up, stimulating your nervous system and boosting mental alertness. But you can have too much of a good thing\u2014and energy drinks have a lot of caffeine. In fact, a new study from scientists at Johns Hopkins says that energy drinks should have warning labels about potential &amp;quot;caffeine intoxication.&amp;quot; A typical 8-oz cup of coffee has about 100 mg of caffeine, though the brew at some coffeehouses can be a bit stronger. The caffeine content of energy drinks, however, can be as high as 500 mg! (The numbers vary by brand, so check the label.) Too much caffeine can cause anxiety, nervousness, sleep problems and even heart palpitations. My advice is to stick to coffee if you need a jolt of caffeine\u2014and limit it to 2 to 3 cups. I want to hear from you, so e-mail me your questions at dailywd@womansday.com.  Disclaimer: Your seeking information on health related topics and/or Sandra Adamson Fryhofer, MD&amp;#039;s providing such information herein constitutes neither the solicitation of nor the provision of medical advice, services, care or treatment. Communication with Dr. Fryhofer on this website does not create a doctor/patient relationship. For concerns about your own particular medical condition, you should consult your own medical professional, who can examine and evaluate you. Communication on a website is not a substitute for taking an active role in your own medical care and treatment and being personally seen by a physician of choice in your area.  "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.womansday.com/life/a42165/energy-drinks-5441/>