Get an albuterol inhaler from your doctor if you just need the breathing benefits... Save your heart a lil trouble
or get salbutamol tabs or any other albuterol in tab form.
Albuterol was proven to be effective at human safe dosages.
might be a bit weaker than clen but has so many other benefits
(insulin sensitivty, anti catabolic, ..)
just dont overdo it
i would usually do 3x 4mg if i would cut