Do not use if under the age of 18, pregnant, nursing, or sensitive to caffeine. Do not consume caffeine or any stimulants from other sources, including but not limited to energy drinks, coffee, soda, dietary supplements or medications. Each servings contains 300 mg of caffeine, about as much as 1 1/2 - 2 cups of strong coffee. Do not use longer than 2 months. Follow with a 1-month off-period. Consult your physician prior to use if you are taking any medication or if you have any medical condition, including but not limited to heart, liver, kidney or thyroid disease, psychiatric disorders, difficulty urinating, diabetes, high blood pressure, cardiac arrhythmia, recurrent headaches, enlarged prostate or glaucoma. Discontinue use 2 weeks prior to surgery. Immediately discontinue use if you experience rapid heartbeat, dizziness, severe headaches or shortness of breath. This product contains ingredients that may be banned by some sports organizations. KEEP OUT OF REACH OF CHILDREN.