Product concentrate
Simply the product concentrate is the active ingredient of the aerosol is combined with the required adjuncts
The active drug (for therapeutic activity)
Propellant/s (to expel the contents from the container)
Antioxidants( to prevent degradationproduct
Surface active agents/Surfactants (to Increase Miscibility)
Solvents/s (to prepare a stable and efficacius product and retard the evaporation of the propellant)
Other exipients like vehicles,suspending agents etc.