Chlamydia is treated with a short course of antibiotics, and the infection clears in the vast majority of cases. The standard treatment is doxycycline, taken twice daily for seven days. Most people who complete the full course are cured, though a few practical steps during and after treatment make a real difference in whether the infection stays gone.
The Standard Antibiotic Regimen
Doxycycline is the preferred first-line treatment for chlamydia. You take it twice a day for seven days. It’s effective for infections at urogenital, rectal, and throat sites, though it performs especially well for rectal chlamydia compared to alternatives.
A single-dose alternative exists for situations where completing a seven-day course isn’t realistic. This option works in one visit, which removes the risk of missed doses. However, clinical evidence has increasingly favored the seven-day doxycycline course, particularly because some studies have reported treatment failures with the single-dose approach. Those failures are often difficult to untangle from reinfection by an untreated partner or incomplete adherence to treatment, but the shift toward doxycycline as the go-to reflects real-world performance data.
If you can’t take doxycycline due to an allergy or another medical reason, your provider will prescribe an alternative antibiotic that covers the same infection.
Treatment During Pregnancy
Doxycycline is not safe during pregnancy, so pregnant individuals receive a different antibiotic. The chosen alternatives are effective against chlamydia while being safe for fetal development. Pregnant people are also typically retested after treatment to confirm the infection has cleared, since untreated chlamydia during pregnancy can lead to complications during delivery and potentially pass the infection to the newborn.
What to Expect During Recovery
Many people with chlamydia have no symptoms at all, which is part of what makes the infection so common. If you do have symptoms like discharge, burning during urination, or pelvic discomfort, they generally start improving within the first few days of treatment. The CDC recommends avoiding sexual intercourse for seven days after a single-dose treatment, or until you’ve completed the full seven-day course and any symptoms have resolved, whichever comes later.
That waiting period isn’t just about your own recovery. You should also avoid sex until your partner or partners have been treated. Skipping this step is the most common reason people end up with chlamydia again shortly after treatment.
Why Your Partner Needs Treatment Too
Treating chlamydia in one person while their sexual partner remains infected almost guarantees reinfection. Partner treatment is a critical part of the process, not an optional add-on. You should notify recent sexual partners so they can get tested and treated.
When a partner can’t or won’t visit a provider, a practice called Expedited Partner Therapy (EPT) allows your clinician to provide a prescription or medication for your partner without examining them first. The CDC supports EPT as a practical tool, particularly for male partners of women diagnosed with chlamydia. It doesn’t replace a full clinical visit, but it solves the common problem of partners who delay or avoid getting care on their own. EPT legality varies by state, so your provider can tell you whether it’s available where you live.
Retesting After Treatment
Even after successful treatment, retesting is recommended roughly three months later. This isn’t because the antibiotics failed. It’s because reinfection rates are high, often from a partner who wasn’t treated or from a new partner. The three-month retest catches these new infections early, before they cause complications or spread further.
If you test too soon after finishing antibiotics, you can get a false positive. Remnants of dead bacteria can trigger a positive result on nucleic acid tests for several weeks after the infection is actually gone. That’s why the retest window is set at about three months rather than immediately after treatment.
What Happens If Chlamydia Goes Untreated
Because chlamydia often causes no symptoms, some people carry the infection for months without knowing. Left untreated, the bacteria can spread deeper into the reproductive tract. In women, this can cause pelvic inflammatory disease (PID), a condition involving pain and inflammation in the uterus, fallopian tubes, or ovaries. PID can lead to chronic pelvic pain, scarring of the fallopian tubes, infertility, and ectopic pregnancy, where a fertilized egg implants outside the uterus. Ectopic pregnancies are medical emergencies.
In men, untreated chlamydia can cause infection in the tube that carries sperm from the testicle, leading to pain and, less commonly, fertility problems. For both sexes, having an active chlamydia infection also increases susceptibility to other sexually transmitted infections.
Is Antibiotic Resistance a Concern?
Unlike gonorrhea, which has developed widespread resistance to multiple antibiotics, chlamydia has remained broadly treatable with standard regimens. Several studies have reported treatment failures, primarily with the single-dose approach, but the picture is more complicated than simple resistance. Research published in the journal Antimicrobial Agents and Chemotherapy found that genetic mutations once thought to drive resistance actually existed in chlamydia strains dating back to 1959 and 1967, decades before the relevant antibiotic entered clinical use in 1991. This suggests these mutations alone aren’t enough to cause treatment failure.
When treatment does appear to fail, the most common explanations are reinfection from an untreated partner, not finishing the full course of medication, or other factors that mimic resistance. True antibiotic resistance in chlamydia, if it exists at a clinically meaningful level, likely involves a complex combination of genetic, epigenetic, and host factors that researchers are still working to characterize. For now, the standard seven-day doxycycline course remains highly effective.