What it is
VCF Vaginal Contraceptive Foam is an aerosol spermicide containing nonoxynol-9 at 12.5%, the highest concentration among over-the-counter spermicides. Apothecus Pharmaceutical, the same company that makes VCF Contraceptive Film, manufactures it. You shake the can, fill the applicator with foam, and insert it deep into the vagina no more than one hour before sex. It has been marketed under the OTC monograph since 1997.
How well it works
VCF Foam uses the same class-level efficacy as other spermicides: 79% effective with typical use and 84% with perfect use in the first year (Guttmacher Institute). The higher nonoxynol-9 concentration may provide more spermicidal action per dose. A Cochrane review found that spermicidal gel with the lowest N-9 dose (52.5mg) was less effective than higher doses. Spermicide alone is one of the least effective contraceptive methods, so pair it with a barrier method like a condom or diaphragm.
Side effects and cautions
The FDA requires all nonoxynol-9 spermicides to carry a warning that they do not protect against HIV or other STIs, and that frequent use (more than once per day) can irritate vaginal tissue and may increase the risk of HIV transmission if exposed (21 CFR 201.325). The higher 12.5% concentration in VCF Foam may increase the risk of vaginal irritation and epithelial disruption compared to lower-concentration products. Common side effects include vaginal or penile irritation, burning, and itching. Do not use VCF Foam if you have a known sensitivity to nonoxynol-9.
Where to get it
You can buy VCF Foam over the counter at pharmacies and online without a prescription. It comes in 0.6 oz or 1.4 oz cans with an applicator. The foam format spreads through the vagina more than film or gel, which some users prefer.