Do not use if you are pregnant or nursing. Consult a physician before using this product if you have, or have a family history of high blood pressure, heart, liver, thyroid or psychiatric disease, diabetes, anemia, nervousness, anxiety, depression, seizure disorder, stroke or difficulty in urination due to prostate enlargment. Do not use if you are taking an MAO or MAOI inhibitor or any other dietary supplement, prescription drug or over-the-counter drug containing ephedrine, pseudo-ephedrine, or phenylpropanolamine. Exceeding recommended dosage may cause serious adverse side effects including heart attack and stroke. Discontinue use and call a physician immediately if you experience rapid heartbeat, dizziness, severe headache, shortness of breath, or other similar symptoms. Individuals who are allergic or hypersensitive to ephedrine or caffeine should avoid the use of this product. Not intended for use by persons under the age of 18. The maximum dosage of ephedrine for a healthy adult is no more than 100 mg in a 24 hour period for not more than 12 weeks. Improper use of this product may be hazardous to a person's health.