Chlamydia Treatment: Doxycycline, What to Expect and When to Retest

Written by Cherlie Joseph, MSN, FNP-BC · Medically reviewed by Naurah Gaspard, DNP, FNP-C, FNP-BC · Updated November 2026

Chlamydia is cured with antibiotics. CDC's first-choice treatment for most adults is doxycycline taken twice a day for 7 days; a single dose of azithromycin is an alternative, especially in pregnancy. Avoid sex until treatment is finished for you and your partners, and get retested in about three months.

How chlamydia is treated

Chlamydia is a bacterial infection, so it goes away with the right antibiotic. The current CDC treatment guidelines (updated in 2021) list:

Option	How it's taken	Notes
Doxycycline (preferred)	Pill twice a day for 7 days	Works better than azithromycin for rectal infection. Not used in pregnancy.
Azithromycin	One-time dose	Recommended in pregnancy and an option when a 7-day course is hard to finish.
Levofloxacin	Once a day for 7 days	Alternative when the others can't be used.

Your provider picks the option based on where the infection is, pregnancy, allergies and other medicines. Take every dose, even after symptoms ease.

Tips for taking doxycycline

• Take it with a full glass of water and stay upright for at least 30 minutes. Lying down right after can irritate the esophagus.
• Taking it with food can reduce nausea. Separate it from antacids, iron, calcium and magnesium supplements, which can block absorption; your pharmacist can tell you how far apart.
• Use sunscreen. Doxycycline makes skin burn more easily, which matters in Florida sun.
• Tell your provider if you could be pregnant before starting.

Symptoms like burning or discharge usually improve within a few days. If they don't, or they come back, reach out; it may be reinfection, a missed dose, or a different infection such as gonorrhea, trichomoniasis or Mycoplasma genitalium.

Sex, partners and avoiding reinfection

Reinfection is the most common reason chlamydia "comes back." To prevent the ping-pong effect:

• Wait to have sex until 7 days after single-dose treatment, or until you finish all 7 days of doxycycline, and until your partners have finished treatment too.
• Tell recent partners (generally anyone from the last 60 days) so they can be tested and treated, even if they feel fine.
• Use condoms with new or untested partners.

Florida's county health departments offer confidential STD testing and can help with partner notification if you'd rather not do it alone.

Retesting and why it matters

CDC recommends retesting about three months after treatment, even if your partners were treated, because repeat infections are common. A "test of cure" right after treatment usually isn't needed for most adults, but it is recommended in pregnancy (about 4 weeks after treatment). Testing too soon, within 3 to 4 weeks, can pick up leftover genetic material and give a false positive.

Untreated or repeated chlamydia in women can cause pelvic inflammatory disease (PID), which can scar the fallopian tubes and lead to ectopic pregnancy, infertility or long-term pelvic pain. Treatment stops the infection but can't reverse damage that has already happened, which is why prompt treatment and yearly screening matter. CDC recommends yearly chlamydia screening for sexually active women under 25 and older women with risk factors such as a new partner.

Getting chlamydia treated online in Florida

Chlamydia is well suited to telehealth. With an online visit, a nurse practitioner can review your symptoms and test results, order testing at a lab near you if you haven't been tested, and send treatment to your pharmacy when appropriate. If you have pelvic pain, fever or testicle pain, we may recommend an in-person exam to check for PID or epididymitis.

Frequently asked questions

How fast does chlamydia go away with treatment?

Symptoms often improve within a few days, but the infection is considered treated only after the full course is finished. That is why you should wait 7 days after single-dose treatment, or until you finish 7 days of doxycycline, before having sex.

Can chlamydia go away on its own?

Sometimes the body clears it, but that can take months, and in the meantime it can spread to partners and cause PID. Antibiotics are the reliable cure, so anyone who tests positive should be treated.

Can I drink alcohol while taking doxycycline for chlamydia?

Moderate alcohol does not cause a dangerous reaction with doxycycline, but heavy drinking can lower its levels and make stomach upset worse. Ask your pharmacist about your specific situation.

Sources

• CDC: Chlamydial Infections, STI Treatment Guidelines 2021
• CDC: About Chlamydia
• MedlinePlus: Doxycycline

Keep reading

• STD Symptoms in Women: Signs of Chlamydia, Gonorrhea, Trich, Herpes and Syphilis
• STD Symptoms in Men: Discharge, Burning, Sores and the Signs That Are Easy to Miss
• STD Testing Online in Florida: Which Tests You Need and How It Works
• Browse all conditions and treatments A to Z

This article is for general education and is not a substitute for medical advice. Treatment, including any prescription, is decided by a licensed provider after reviewing your health history. OurTopClinic is not for emergencies; if you have a medical emergency, call 911. OurTopClinic serves adults located in Florida, New Mexico, Oregon and Washington. Learn more at ourtopclinic.com.