In new guidelines released Tuesday, U.S. health officials now recommend that certain people take the antibiotic doxycycline as a morning-after pill to lower the risk of some sexually transmitted diseases (STDs).

The latest recommendations only apply to gay and bisexual men and transgender women who have had an STD in the past year and are at high risk of getting infected again. While pas...

A chlamydia vaccine has triggered immune responses in an early trial, raising hopes that one day it might help curb the spread of the sexually transmitted infection (STI).

There is currently no vaccine for chlamydia, which is the most common bacterial STI in the United States, according to the U.S. Centers for Disease Control and ...

Just one dose of the antibiotic doxycycline taken after sex halved the number of chlamydia and syphilis cases in San Francisco, promising new research shows.

In the study, gay and bisexual men and transgender women who had a history of sexually transmitted infections or multiple sex partners were given a supply of the antibiotic and asked to take two 100-milligram pills within 72 hours of...

Data showing that the antibiotic doxycycline might prevent a sexually transmitted infection (STI) if taken soon after sex made headlines earlier this year.

As surging numbers of cases of syphilis and gonorrhea affect more Americans, here's what you need to know about using the drug.

"If you're actively having sex and not using con...

The first home test for chlamydia and gonorrhea will soon hit the market, following its approval Wednesday by the U.S. Food and Drug Administration.

People will be able to buy the Simple 2 Test over-the-counter at a pharmacy, take a specimen in the comfort of their home and send their sample to a designated laboratory for testing, the FDA said.

The test is produced by LetsGetChecked...

Sexually transmitted infections (STIs) are surging in the United States, with notable increases seen in case counts of syphilis, gonorrhea and chlamydia.

Overall, STIs grew by 7% in 2021, reaching 2.5 million cases, according to the latest data from the U.S. Centers for Disease Control and Prevention.

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Many American teens and young adults underestimate the risk of sexually transmitted infections from unprotected oral sex, and that's especially true of young men, a new survey shows.

Doctors say oral sex can transmit herpes, gonorrhea, chlamydia, syphilis, HIV and human papillomavirus (HPV), which can lead to cervical cancer, and head and neck cancers.

While there is an