I take 2 tabs. I have been taking 2 tabs before every workout in my cutting phases for over 2 years now and can still feel the stimilating effect big time. Sometimes I might just take one on the days that I have alot more energy than usual not to overtimulate myself.
Took Xenadrine and creatine while cutting last summer and saw my abs for the first time in many years.
It also gave me incredible energy in the gym.
There was a downside for me though....resting heart rate around 90 bpm, blood pressure 160-170/90-100. so I had to give it up.
READ the label and monitor BP and HR if u use ECA.