I have used an E/C/A while on a cycle and had no problems. Get your blood pressure checked from time to time to make sure it does not get to high. Xenadrine on a cycle should give you some nice results(as long as you have a good diet)
It's Xenadrine(unless you meant anything else) and Xenadrine is not Clenbuterol or even close to it
it's an E/C/A stack (Ephedrine/Caffiene/Aspirin) a legal nutritional supplement and it's far away from Clenbuterol