How long do energy drinks last after opening?

Energy drinks that have been continuously refrigerated will keep at best quality for about 2 to 4 days after opening. read more

If you drink slower, say for three hours, you get less energy, but it's just about enough to keep you awake. Five hours after opening is my personal deadline, you can still drink them, but without expecting to get any energy. read more

Best Answer: Energy drinks are carbonated just like a soda is. If you leave them open for too long they may taste flat, but they do not go bad until after the expiration date on the can. read more