pre contest clen use and possible clash with pre workout suplement

[sammerthehammer]

hey guys, just wanting some insight into whether or not anyone knows if there is any clash between taking clenbuterol and a pre workout supplement such as Nano Vapor. ive been told that it will make the clen much less effective, but i dont really understand why. also im starting to drop my carbs a lot this monday and i could really use something to help me push through my workouts.
thanks

[magic32]

I'm not familiar with that supplement, but there would only be a contraindication if it contains a major CNS stimulant.

[sammerthehammer]

i know its got some stuff in it like caffiene and arginine NO complex stuff etc. its basically the same thing as NO Xplode or Xpand or any of those pre workout supplements.

[fatrock]

As far as i know high amounts of other thermogenics like ecca stack, ephedra, caffiene will down regulate your beta receptors making the clen less effective.