Condoms with Spermicide

[ninja]

Why do condoms with spermicide already on them have shorter life spans until the experation dates? and does the spermicide weaken the condom?

[dancingdoc2]

I do not have answers to your questions; however, it is generally accepted that condoms with spermicide on them are not very effective. Why spend the extra money? It is better to select your regular condom of choice and add a vaginal spermicide.

[Brandye]

I was not aware that was the case. Guess: The spermicide has a shorter shelf life than the condom, itself. It is also possible that the detergent (most condoms with spermicide use Nonoxynol-9) causes deterioration of the latex over a long period. This should have no effect on poly condoms.

Now, to expand upon doc's point above, 100-150 milligrams of spermicide (active ingredient) is required in the vagina to be effective; the more, the better. With the spermicide on the condom, only 10-20 milligrams, at most, are available. In other words, the spermicide is only lube and may catch the rogue sperm or two swimming out the open end. We recommend condom on the penis and spermicide in the vagina for adequate protection against pregnancy.

[ninja]

so would it be safe to use a condom with spermicide only a month or 2 after its experation date?

[Brandye]

No, that is not what was said. The manufacturer establishes the shelf life of the products based upon laboratory experiments noting the degradation. There is a certain safety factor built-in before establishing this shelf life. I do not know what that is. If you are seeking to save a few shillings, don't. The condom may be fine. It may have deteriorated. If the date says it is expired do not use it. Buy fresh.