There is no medication in the United States that may help prevent trichomoniasis. However, a vaccine for trichomoniasis has been marketed in Europe but has proven to be largely ineffective. There are several factors that can reduce the chances of contracting trichomoniasis. These include:

• Refrain from having sexual intercourse. Complete abstinence – refraining from vaginal, anal and oral sex – is the best way to prevent becoming infected with trichomoniasis.
  
  
• Maintain a sexual relationship with just one partner. Restricting sexual relations to just one partner who is not infected with trichomoniasis can significantly reduce the risk of contracting the infection.
  
  
• Use condoms. Use of condoms during vaginal, anal and oral sex can substantially reduce – but not eliminate – the risk of contracting trichomoniasis. Condoms must be used every time a person has sex. Male latex condoms or female polyurethane condoms should be used during vaginal sex. Male condoms should be used during anal sex, and a rubbery material known as a dental dam should be used during oral sex. It should be noted that although female condoms and dental dams offer some protection against sexually transmitted diseases, they are not as effective as male latex condoms.
  
  
• Do not share swimsuits, towels, washcloths, bath sponges, loofahs or bath brushes. The trichomonosis parasite can live outside the body for as long as 45 minutes and can be transmitted to someone whose genitals come in contact with damp objects that have the parasite on them.
  
  
• Exercise caution when using public restrooms, as trichomoniasis can be transmitted through contact with a toilet seat. Refrain from sitting on an unprotected toilet seat or use a protector before sitting on the seat.