After such an accident, you and your partner should get tested for STDs, including HIV, as soon as possible. If you have been exposed to the HIV virus, ask for postexposure prophylaxis (PEP), a "morning after" treatment for HIV that may prevent infection. The treatment is a monthlong course of HIV (antiretroviral) medications that are most effective if you start them right awaybut may still work up to 72 hours after exposure. Side effects can include extreme nausea and fatigue.
If you are a woman worried about unwanted pregnancy, consider following your condom accident with Plan B. The high-dose birth control pill is available over-the-counter (it's also known as emergency contraception, or EC) and can prevent pregnancy if taken within 72 hours. Plan B is most effective when taken right away, and taking it within 24 hours is encouraged. Many women's health organizations recommend purchasing it before you need it, so that it's readily available if you ever do. Call a doctor, a health clinic, a pharmacy, or a Planned Parenthood office, or place an overnight order from Drugstore.com.
Avoid future accidents
Once the immediate crisis is over, says Perry N. Halkitis, PhD, a psychologist specializing in HIV at New York University, put some thought into why the condom broke. "These accidents don't happen easily," he says. "Are you using condoms correctly? Are you using the right kind of lube? Are the condoms old or expired? It's important to identify the problem so you can avoid an accident in the future."