Do not take: within 6 hours of bedtime. Do not combine with any other stimulants. Seek advice from a health care practitioner prior to use if you have any pre-existing medical condition including (but not limited to): hypotension, hypertension, heart, liver, or thyroid disease, diabetes, psychiatric disease, asthma, pernicious anemia, anxiety, depression, seizure disorder, cardiac arrhythmias, stroke, difficulty urinating due to prostate enlargement, or if you are taking an MAO inhibitor or any other prescription drug. DO not use if pregnant or contemplating becoming pregnant or nursing. Discontinue if excessive sleeplessness, tremors, dizziness, nervousness, headaches, or heart palpitations occur. For healthy adults only. Not for persons under the age of 18. Keep out of reach of children..