Taking ephedrine before a workout would not make any sense. It works as a vasoconstrictor so therefor youd be getting less nutrients like creatine and proetein and other essentials in your body and you would get depleated quicker. And actually it can be harmfull to muscle if taken too long. But it is a good product when used with proper eating and exercise and combined with thermodynamics.

I think it just gives u a boost? Thats all