Maximum recommended dosage for adults is 100 to 300 mg per day, taken in equal doses of no more than 30 mg each. Those who consume it report little or no appetite. However, misuse of ephedra or products containing ephedra or ephedrine may pose significant health hazards. Do not use ephedra if pregnant, nursing, or if you have anorexia, anxiety, bulimia, glaucoma, or cerebral perfusions. Reduce or discontinue use if nervousness, tremor, sleeplessness, loss of appetite, or nausea occur.
Prolonged use can weaken the adrenal glands and lead to nervousness and insomnia.
Do not use if taking an MAO inhibitor, or any other prescription drug. Not intended for sale or unsupervised use for persons under 18. Chronic use can lead to rapid development of tolerance and dependence. Summary Based on historical Chinese usage, ephedra appears to have several health benefits. However, credible research is limited.