Why use condoms with spermicides?
Using a spermicide AND a condom significantly reduces
the chance of unwanted pregnancy. On most
"spermicidally lubricated" condoms there is probably
not enough spermicide to make much of a difference.
If you want to increase the contraceptiveness of
condoms you should use a seperate spermicial product
such as foam, film, vaginal insert, or jelly. If you
choose to use additional spermicide, select one with
octoxynol-9. Nonoxynol-9 has been shown to cause
genital/rectal irritation.