How long do the spermicides remain effective before reapplication is necessary?
The creams, jellies, suppositories and films remain effective for no more than one hour, and a repeat application of spermicide is recommended for each act of intercourse. The bioadhesive technology (Advantage 24) provides protection for up to 24 hours prior to a single act of intercourse. However, a repeat application is required prior to each additional act of intercourse even with Advantage 24.
