They provide a burst of energy and help millions to stay wide awake but now some well known energy drinks are being linked to several deaths.

These drinks aren't regulated by the FDA but are a common staple for students looking to catch that buzz and more importantly do some late-night studying, but that buzz may be coming at a serious cost.

Five deaths and a heart attack have been linked to monster energy drinks, drinks doctors say are just plain unhealthy.

Bard Zind a local pediatrician said, "they have to get up really early, and then the problem as we know, is that kids who drink caffeine really early in the morning, it affects there sleep at night. so you drink caffeine it affects your sleep, you don't feel very well rested, so you drink more caffeine the next morning to wake up, and so it's a cycle."

Students say they like the taste of beverages and use the drink on a daily basis to keep them awake for there studies.

Will Reeves a CMU student said, "I know it's probably not great for you, but it tastes a lot better than coffee so I think it helps you when you need to stay up at night and do a lot of home work"

However not all students consume the sugary drinks, another student at CMU says her classmates drink the energy drinks because the look of the can seems "cool"

"I personally don't drink them, because I feel like there unhealthy, just the amount of sugar and all the other ingredients I can't pronounce, so I just feel there unhealthy," said CMU student Jacie Temple.

The 16 ounce size monster energy packs nearly 54 grams of sugar, resulting in 200 calories per can.

Doctors say when it comes down to it, caffeine is a drug, and it needs to be regulated.

Zind added, "That caffeine increases you're heart rate, increases your blood pressure, and can also have some side effects on the heart rhythm, and those are side effects you can have immediate problems from that, as well as the heart rate and blood pressure too"

Monster energy drink has become the number 2 selling energy drink world wide and can now be found in many countries.

Doctors suggest to students who need an extra boost to switch to coffee, that way they have a better idea of how much caffeine there really getting.