After nasal cavity surgery, the nasal pack is usually inserted in the nasal cavity to absorb blood and stop bleeding. Bacterial infection may occur since the nasal pack is normally left there for 3-5 days, therefore, oral or instill antibiotic drugs are prescribed. Hence, the nasal pack material with sustained anti-bacterial property will be useful. Here the poly(vinyl acetal) foam was prepared by crosslinking poly(vinyl alcohol) with aldehyde. The optimized formula for foam preparation used the combination of glutaraldehyde and formaldehyde and 20 h of curing time. The obtained foam was flexible and possessed open cell structure with 148 µm diameter approximately. Moreover, amoxicillin was loaded into calcium alginate microparticles. The prepared microparticles showed encapsulation efficiency of 16% and loading capacity 23% approximately. The foam was impregnated with amoxicillin-loaded microparticles through the use of PV(OH) binder. Amoxicillin could be released slowly from the foam when tested in simulated nasal fluid pH 6.8, 37°C.