Hi, this is my first post on this great site. Let me chime in with around 300mgs. I started using the stuff with "Ultimate Orange" back in the summer of 95 and have used various brands, my favorite being Ephedra hcl in 25mg. tabs. This stuff is regulated now and I need a drivers lic. and signiture when I buy.
I use it for pre workout and to get me through the day at work, 10 to 12 hrs.
Needless to say, some of my "receptors" may be shot. The longest I was off of the stuff was about a month.
At the most, I'd get a rare headache. I have gotten used to this stuff but I still get a good jolt.
I take 4 at a time but have taken 5. I don't think I've taken more at one time. Some times I'll take it with 200 to 400 mg of caffine.
back in the day, I would literally eat the old white crosses by the handful, 400 to 500 mg in a day, that was with about 24 beers though, wouldn't even consider taking anything above 75 mg in a day now.