The best protection will occur when the insert is placed deep into the vagina near the cervix. Most inserts provide protection from 10 minutes to 1 hour after the product is inserted . Place a new insert each time intercourse is repeated. If intercourse has not taken place within 1 hour after placement of the insert, use a new insert. Advantages Spermicides may be purchased at the drugstore, family planning clinics and some grocery stores without a doctor's prescription.
Spermicides are easy to use and easy to carry.
Use of a latex condom and spermicides, which contain the chemical Nonoxonyl-9, together reduce the risk of spreading sexually transmitted diseases. These spermicides will not cure any sexually transmitted disease. See a physician for treatment if you think you have one. At least 20 women out of 100 will become pregnant if using a spermicide by itself. Spermicides must be inserted at the time of having intercourse and may seem like an interruption.