Spermicides are typically a gel that are used in conjunction with barrier methods. That is the condom, the cervical cup, the diaphragm, and the sponge. These are very effective in conjunction with these barrier methods. However, alone they are not very effective, so whenever using a spermicide, make sure that you’re using a barrier method along with the spermicide. Oftentimes, if in a sample of a diaphragm, if you have used the spermicide and you have not had sexual relations, it is important to replace the spermicide within a 2 hour window.