I did alot of reasearch about taking creatine. There are no negative side effects other than taking alot of restroom breaks because of the increased amount of water intake.

Q: Are there any unfavorable effects with using Creatine?

A: Creatine occurs naturally in many foods, with an especially high concentration in red meats and fish. While using Creatine, you may notice increased urination, but this is simply due to the extra volume of liquid you'll be drinking when mixing your Creatine. If you do not wait three to four hours between doses, you may experience some stomach discomfort. This is easily resolved by spacing your Creatine dosages throughout the day or cutting dosages in half for one to two days.

The best part about creatine-no adverse effects have been reported in any studies. NONE! Creatine is totally safe and effective. Creatine has never been shown harmfully toxic. Nevertheless, just like with anything, it is not recommended to over-supplement once your muscles are saturated with creatine-there is no reason to. This means, stick to the recommended dosages, and be prepared to experience the very best muscle, strength, energy, and endurance gains possible!