To continue the energy drink rank I recently picked one up called Speed Shot from ABB. Personally i love energy drinks and Im always known for having one around. But the warning on this is ridiculous:

WARNING: Not intended for use by persons under 18. Do not exceed recommended dose. this product contains caffeine and yohimbe extract which contains yohimbine. While using this product do not consume caffeine from other sources including, but not limited to, coffee, tea, soda, and other dietary supplements or medications containing phenylephrine or caffeine. Do not use if you are pregnant or nursing. Consult your physicain prior to use if you are taking medication, including but not limited to MAO inhibitors, antidepressants, aspirin, NSAIDS, or products containing phenylephrine, ephedrine, pseudoephedrine, or other stimulants. consult your physician prior to use if your have, or are being treated for, any serious medical condition, including, but not limited to, heart, liver, kidney, or thyroid disease, psychiatric or epileptic disorders, difficulty urinating, diabetes, high blood pressure, cardiac arrhythmia, recurrent headaches, enlarged prostate, ulcers, or glaucoma. Discontine 2 weeks prior to surgery or immediately if you are experiencing rapid heart beat, dizziness, servere headache or shortness of breath. Do not mix with drugs or alcohol. Do not use if dehydrated or during intense physical activity in high temperature conditions. Do not drink after 5:00 pm if you have difficulty sleeping.

Thats sad you have to read something like that for a simple drink like this.