Spiropent is a brand name for the chemical Clenbuterol Hydrochloride or Clenbuterol HCL.
Spiropent is very expensive and is not one bit better or worse than any other Clenbuterol manufacturer.

In fact, there are many brand names for Clenbuterol Hydrochloride HCL.

Here is a list:
Broncodil, Broncoterol, Cesbron, Clenasma, Clenbuter, Pharmachim, Contrasmina, Contraspasmina, Monores, Nihfi, Novegam, Oxyflux, Prontovent, Spiropent, Ventolase,
Ventapulmin etc.

More information about clenbuterol?
http://www.clen-board.com