Everyone responds differently and you have to gauge your dose to just that. Most herbals have teh equivilant of 20mg of ephedrine, 100-200 mg of caffine and 200-300mg of asprin. Many people simply take 1 25mg tab of pure ephedrine, 250mg of caffine and a 325mg asprin. Try the stack both ways and determin which you like better. Many people don't like the separate drugs because they get too jacked up so you decide. Please be careful and one more thing. Give your body a rest for the weekends and for at least a month every 3 months.