Do not take if you are currently taking nitrates for chest pain or if you are taking medication used to treat erectile dysfunction such as PDE-5 inhibitors. This product is only intended to be consumed by healthy adults 18 years of age or older. Before using this product consult with your physician if you are pregnant or nursing, or if you are using any prescription or over the counter medication or if you have any pre-existing medical condition including but not limited to: high or low blood pressure, cardiac arrhythmia, stroke, heart, liver, kidney or thyroid disease, psychiatric or epileptic disorders, diabetes, recurrent headaches, enlarged prostate, difficulty urinating, glaucoma, or if you are taking a MAOI (Monoamine Oxidase Inhibitor), antidepressants, aspirin, nonsteroidal anti-inflammatory drugs or products containing phenylephrine, ephedrine, pseudoephedrine, or any other medication. Contains caffeine. Do not use in combination with synephrine, caffeine or any stimulants from other sources whatsoever including but not limited to, coffee, tea, soda and other dietary supplements or medications containing phenylephrine or caffeine. Discontinue use and consult your health care professional 2 weeks prior to surgery, or if you experience rapid heartbeat, dizziness, severe headache, shortness of breath or any other adverse reaction to this product. Do not combine with alcohol. Do not exceed recommended serving. Do not use for more than 8 weeks. IMPORTANT DISCLOSURE: This product may contain legal dietary ingredients that are prohibited by Sports and/or cause a false positive for banned or prohibited substances ("PS"). Due to the unique restrictions of amateur and professional sports organizations, the Armed Forces, law enforcement and other agencies and employers, as well as the possibility of legal dietary ingredients causing a false positive for PS, do not take this product if you are subject to PS testing without the approval and/or authorization of the organization, entity, agency or governing body that requires the testing.