Is it safe to take multi-vitamins?!

Is it safe to take multi-vitamins?

I am 25 years old and have a history of kidney stones. But now I am losing lot of fair and I was advised by some friends to take multi-vitamins.

First what does it mean that you are losing lot of fair? Some vitamins are dangerous if they are taken in excess. You may need some particular vitamins that may help in your condition but under strict medical supervision. Avoid vitamin A and E in excess. Try to obtain your vitamin needs from proper nutrition. Good luck.
PS: To those two ignorants who marked a thumb down, try to investigate before you judge. You can read many articles of respectful origin about dangers of vitamins in excess e.g. http://www.txai.org/news/2003/05160301.h... but don't be a stupid and ignorant then trying to judge people.