Something about enantiomers or optical isomers

How the hell is it like the standars rescue when half of it is basically fucking you?

Would it be a better idea to replace that with inhaled salmeterol (LABD)? Ive heard LABD (long acting bronchodialators) are not the best choice for rescue but I also know the same is said of Symbicort and I have come to find that is not the case for myself and it is excellent in that regard. It has me just asking questions now, hitherthereto

• (S)-salbutamol (sinistra, left)
• ®-salbutamol (?)