Ciprofloxacin albumin microspheres were prepared by the spray drying techni
que, with bovine serum albumin as the natural biodegradable wall material.
The spherical microspheres, flowed well, were organic solvent free and in t
he size range 1 similar to 5 mum. The drug release from the microspheres co
uld be retarded by further thermal denaturation. The sustained-release micr
ospheres were suitable for dry powder inhaled lung drug delivery systems.