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Internal Condom vs Spermicide

A side-by-side comparison of two birth control methods — efficacy, cost, how they work, and who shouldn't use them.

Last verified October 11, 2026Updated October 11, 2026

Side-by-side comparison

Internal Condom A soft pouch worn inside the vagina that blocks sperm and lowers the risk of STIs, usually obtained with a prescription.
Spermicide A chemical gel, foam, or film inserted into the vagina before sex to disable sperm, available over the counter.

Method	Internal Condom A soft pouch worn inside the vagina that blocks sperm and lowers the risk of STIs, usually obtained with a prescription.	Spermicide A chemical gel, foam, or film inserted into the vagina before sex to disable sperm, available over the counter.
Efficacy	Internal Condom 79% typical use Least effective: under 90 out of 100 people successfully prevent pregnancy per year.	Spermicide 79% typical use Least effective: under 90 out of 100 people successfully prevent pregnancy per year.
Cost	Internal Condom $0–$3 per unit Insurance: Usually	Spermicide $16–$18 per package Insurance: Varies
Duration	Internal Condom Single use	Spermicide Single use, one dose before each act of sex (gel works for up to 1 hour; film goes in 15 minutes to 3 hours before sex)
Reversibility	Internal Condom Reversible	Spermicide Reversible
STI protection	Internal Condom Yes	Spermicide No
How it works	Internal Condom A soft, loose-fitting nitrile pouch lines the vagina and collects semen. The inner ring anchors it at the cervix and the outer ring stays outside the vaginal opening.	Spermicide A chemical (usually nonoxynol-9) immobilizes or kills sperm on contact. Inserted into the vagina before sex.
Prescription	Internal Condom Required Telehealth Prescription	Spermicide Not required Over-the-Counter
Side effects	Internal Condom Mild irritation or discomfort Slippage with incorrect insertion	Spermicide Vaginal or penile irritation Increased risk of UTI Allergic reaction
Who shouldn't use this	Internal Condom None reported	Spermicide Sensitivity to nonoxynol-9 High risk of HIV exposure, or HIV in you or a partner (frequent use may increase transmission risk)

Key differences

With typical use, 21 in 100 people using Internal Condom get pregnant in a year, vs 21 in 100 with Spermicide (both least effective). How long it lasts: Internal Condom, single use; Spermicide, single use, one dose before each act of sex (gel works for up to 1 hour; film goes in 15 minutes to 3 hours before sex). STI protection: only with Internal Condom. A prescription is needed for Internal Condom, not for Spermicide. Internal Condom: costs $0–$3 per unit. Spermicide: costs $16–$18 per package.