I wouldnt. Youll over stim, crash hard off the caffiene, and if Clen is used correctly in terms of diet and cardio, youll see great results.
It also alot of stress on the heart to have that much going on. Unless its like 25-50mcg of Clen and 200mgs caffiene, thats as high as i would max the combo.
No onthe other hand im a fukcing hyprocrite and down coffee and AMP energy drink while on 100+mcg of clen before.
BUT in my deffense, i have an insane caffiene/stim tolerance and slowly ramped up, also used Levithan reloaded on Clen.
I am dumb i admit, but i payed close attention to heart rate, feelings in general. Kept water up.