“Spermicide” describes a bunch of different creams, films, foams, gels, and suppositories that contain chemicals that stop sperm from moving. You insert it deep in your vagina, so it also keeps sperm from getting through your cervix and into your uterus.
How to Use It
Every type of spermicide is different, and there are a lot of them available. So be sure to read the instructions on the packaging and check the expiration date. For the most part, though, you simply insert the spermicide with your fingers or with an applicator, just like you'd insert a tampon.After insertion, some spermicides require that you wait ten minutes before having sex. These types of spermicide are also only effective for a single hour after you put them in—so you have to get the timing right.
There are positive and negative things to say about each and every method. And everyone's different—so what you experience may not be the same as what your friend experiences.