You would do 3x a day. Believe ephedrines starts at 12.5mg so it would look like
12.5mg ephedrine (1tab), 1 aspirin tab, 200mg caffeine ( generally a tab or coffee for instance)
Do this morning , afternoon, early evening
After a week you can double the ephedrine dose to 25 mg.
Most people do 2 weeks on 2 weeks off I believe as you can build a tolerance