Other than condoms, what is the best form of over-the-counter protection that a woman can use?

Other than condoms, what is the best form of over-the-counter protection that a woman can use?
If you mean birth control then that would probably be a female condom or vaginal contraceptive film.
glasses
The use of condoms with spermicide and they sell spermicide sponges that a woman places in side her before intercourse.
A box of Tylenol..Take the box, place it between her knees and squeeze together. Keep knees together. 100% effective
Old-fashioned remedy...aspirin between the knees.
there is none.