What it is
The contraceptive sponge is a soft foam disc that is placed deep inside the vagina before sex. It contains spermicide and has a loop for removal. It works as a physical barrier over the cervix and releases spermicide to kill sperm.
How well it works
Effectiveness depends heavily on whether you have given birth vaginally. Typical-use failure is roughly 14% per year for people who have never given birth vaginally and about 27% for those who have. With perfect use, failure is lower, but the sponge is still one of the less effective methods.
How to use it
You wet the sponge with clean water until it is sudsy, then insert it deep into the vagina so it covers the cervix. Protection starts right away and lasts for 24 hours, even with repeated sex. You must leave it in place for at least 6 hours after the last act of sex, and you should not leave it in longer than 30 hours. Then pull it out by the loop.
Side effects and cautions
Vaginal irritation (burning, itching, or a rash) can occur. The US sponge contained nonoxynol-9. Frequent use of nonoxynol-9 spermicide can irritate vaginal tissue, which may increase the risk of HIV transmission if exposed. The CDC assigns nonoxynol-9 spermicide a higher risk category for people at high risk of HIV infection. Toxic shock syndrome has been reported with sponge use, so the label says not to use it during a period or if you have ever had toxic shock syndrome.
Where to get it
The contraceptive sponge is not currently sold in the US. The FDA drug database lists the US sponge (NDA 018683) as discontinued, and its DailyMed label shows its product code as inactivated. When it was sold, it was available over the counter without a prescription.
