How Long Should You Wait to Have Unprotected Sex After Antibiotics?

A recent study found that taking a dose of the antibiotic doxycycline right after unprotected sex prevents chlamydia, gonorrhea and syphilis. This is called doxycycline post-exposure prophylaxis or doxyPEP.

Other ways to prevent UTIs include peeing often after sex and drinking lots of water to flush bacteria from your body. And always use birth control to prevent pregnancy.

Getting tested

If you have ever had an unprotected sex, even once, you should get tested for STIs (sexually transmitted infections). The sooner you find out whether or not you have an STI, the more likely you are to clear it up and prevent spreading it to others. Many health professionals don’t include STI testing in routine checkups, but you can ask to be tested for them. Many STIs don’t have symptoms or go away, which makes them difficult to diagnose without testing.

If your doctor does diagnose you with an STI, they will prescribe antibiotics to treat it. The antibiotics will kill bacteria and should clear up your infection. It’s important to finish the whole course of treatment so that you don’t re-infect yourself. Some STIs, like chlamydia and gonorrhea, can cause long-term problems if they are not treated early on.

Other STIs, such as herpes and HIV, can remain in your body for years. Fortunately, these viruses can be prevented with medication. Most herpes medications can also reduce the frequency of outbreaks and the severity of symptoms. Taking the right doses of medication at the right times can help you manage your herpes and keep it from spreading to other sexual partners. Birth control can also reduce your risk of pregnancy, but it only works if you use it correctly every time.

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Pregnancy tests

Many people wonder when they can have sex after antibiotics for a urinary tract infection (UTI). Antibiotics treat infections caused by bacteria and are not a form of birth control. While you’re taking them, you should be using a different method of birth control to prevent pregnancy.

If you have a chlamydia infection, your doctor may recommend that you wait until 7 days after you finish the antibiotics before having sex again. This is because it can take seven days for chlamydia bacteria to completely leave your body. If you have sex before this, you could pass the infection on to your partner.

STIs like chlamydia, gonorrhea, and syphilis are on the rise nationwide. They can cause serious health problems, including infertility in women. It’s important to get tested regularly and use a condom every time you have sex. If you’re worried about an STI, you can talk to your GP or visit your local sexual health clinic. These are confidential services. If you have a positive test result, be sure to tell your partner right away. You also want to use a back-up method of birth control, such as condoms or the pill. Most forms of birth control can protect you from pregnancy, but only condoms reduce your risk of STIs.

STI tests

STIs are caused by bacteria, viruses or parasites and can be passed between people during sexual activity – even anal or vaginal sex. STIs can cause infection, sickness and long-term damage or problems such as infertility and pelvic inflammatory disease (PID).

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Health professionals recommend that sexually active people get a full STI screen, including tests for gonorrhoea, chlamydia, syphilis, HIV and herpes every year. This is more important for people who change their sexual partners frequently. All females under 25 should also be tested for gonorrhoea and chlamydia each year and those who are pregnant or planning pregnancy should have this done as early as possible.

STI screening can be done with a blood test or with throat swabs, anal swabs or vaginal swabs. It is usually bulk billed so there is no cost to you. STIs can be treated with antibiotics but some, such as herpes and HIV, are not treated with antibiotics and need lifelong treatment.

If you have a positive STI test result, your doctor will usually ask if you would like to inform any recent sexual partners about the result. This can be done face to face or there are a number of anonymous services available. Your doctor may also give you information about safe methods of STI prevention, such as using condoms.


Antibiotics are medicines that fight infections by killing or decreasing the growth of bacteria. They come in different forms, including tablets, capsules, liquids, creams, and ointments. You need a prescription from your doctor to get antibiotics, as they are not available over the counter.

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If you’re given a course of antibiotics to treat an infection, such as chlamydia (Cl-achomatis), you need to wait until the medication is finished before having sex. This is to make sure that you have cleared the chlamydia from your body so that you can’t pass it on to someone else. Chlamydia can cause serious health problems if not treated, and it can lead to infertility in women.

Research suggests that taking the antibiotic doxycycline soon after unprotected sex may reduce the risk of STIs in men who have sex with men, and in transgender women who have sex with women. However, further research is needed to confirm these findings. And using antibiotics to prevent STIs raises the risk of developing resistance, which could limit our future options for treating certain infections.

It’s important to remember that some antibiotics don’t mix well with other medications, including hormonal birth control pills. Check the information leaflet that comes with your medicine and ask your doctor or pharmacist about possible drug interactions. It’s also important to drink plenty of water while taking antibiotics, as this helps flush out bacteria in the urine.

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