Warnings: Consult a health care practitioner prior to use if you are taking lithium or medication for cardiovascular diseases, erectile dysfunction and/or blood thinners, or you have high blood pressure, glaucoma, and/or detrusor instability, overactive bladder syndrome, a renal/kidney disease, a psychiatric or neurological disorder such as but not limited to depression, schizophrenia, seizure disorders or are following a low protein diet, or suffering from a cardiovascular disease and are attempting an increased physical activity. Consumption with natural health products or other drugs (e.g. ephedrine, bitter orange extract, synephrine, octopamine, ephedra) which increase blood pressure is not recommended. Consumption with other caffeine containing products (e.g. medications, coffee, tea, colas, cocoa, guarana, mate) is not recommended. This product is not intended as a substitute for sleep. Consult a health care practitioner if you are of child bearing age, pregnant or breastfeeding, or if your cardiovascular condition worsens. Hypersensitivity/allergy is known to occur, in which case, discontinue use. Caffeine may cause anxiety, tachycardia (rapid heart rate), palpitations, insomnia, restlessness, nervousness, tremor and headache. Some people may experience gastrointestinal discomfort. People sensitive to nicotinic acid may experience flushing of the skin that is generally mild and transient. May cause flushing, tingling, and/or prickling of the skin, in which case reduce the dose. Do not use if you have had a heart attack/myocardial infarction.