Patient : Is there anything as too much b-12. I'm a long distance truck driver. I take a multi vitamin and a separate b12 pill. I also take 5 hour energy drink which is loaded with b12. Also I drink zip fizz which is a powder power drink you mix with water that had high doses of b12. They say b12 is good for energy and to help you stay awake. I do get plenty of rest but when I have to night drive even though i slept for 10 hours I sometimes have a tough time staying awake. My sleep pattern hangs often. Some days i drive nights others i drive days. Thank you Eric
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