Prevention and Education
Mycoplasma Genitalium Treatment: What Works Now
Quick answer: Mycoplasma genitalium is treated with a two-step antibiotic course — usually doxycycline for 7 days, followed by azithromycin or moxifloxacin — because the bacteria are now highly resistant to older single-drug treatments. A test of cure is often recommended afterward, and treatment is the same for women and men.
How Is Mycoplasma Genitalium Treated?
Mgen is one of the more frustrating infections I treat, and I'm upfront with patients about why: it has no cell wall, so familiar antibiotics like penicillin do nothing, and over the years it has grown highly resistant to azithromycin, the drug that used to clear it easily. Because of that, the CDC now recommends a resistance-guided, two-step approach rather than a single dose:
Doxycycline 100 mg twice daily for 7 days — this brings the bacterial load down first.
Then a second antibiotic, chosen by resistance: azithromycin (a 2.5 g course over 4 days) if the strain is macrolide-sensitive, or moxifloxacin 400 mg daily for 7 days if it's resistant.
Where resistance testing isn't available, I typically see doxycycline followed by moxifloxacin. The sequence genuinely matters, so this is a prescription-and-follow-up situation, not a one-and-done.
Why Isn't a Single Antibiotic Enough?
This is the part that surprises people. A single azithromycin dose used to be standard, but it now fails in a large share of cases — cure rates have dropped to around 50% — and it can actually breed more resistance. Doxycycline alone clears only about 30–45%. The two-step sequence was developed precisely to beat that resistance, and in most cases it pushes cure rates back above 90%.
Is Treatment Different for Women?
The antibiotics are the same for women and men. What differs is the stakes: in women, untreated Mgen is linked to cervicitis and pelvic inflammatory disease, which can affect fertility — so I'm especially firm about finishing the full course.
Test of Cure and Partners
Test of cure — because resistance is common, a follow-up test about 21 days after finishing treatment is often recommended to confirm it worked.
Partners — current partners should be tested and treated so the infection doesn't bounce back.
Avoid sex until everyone involved has completed treatment.
When to Seek Urgent Care
Pelvic pain with fever (possible PID).
Symptoms that persist after treatment — this can signal a resistant infection.
Symptoms during pregnancy.
Frequently Asked Questions
Can mycoplasma genitalium be cured?
Yes — in most cases, resistance-guided two-step treatment tops 90% cure. It just takes more than a single pill.
Why do I need two antibiotics?
Doxycycline lowers the load and a second drug finishes the job — together they overcome the resistance Mgen has developed.
What if treatment doesn't work?
A persistent infection is usually resistant; your provider can switch regimens, which is why I lean on a test of cure.
The Bottom Line
Mgen is curable, but its resistance means it takes the right two-step course — and often a follow-up test — not a quick single dose. If you have symptoms or a positive result, you can get tested and work with a provider to treat it properly. For the bigger picture, see how Mgen compares to chlamydia.
Last reviewed: September 2026
Medical review: This article is for informational purposes only and does not constitute medical advice. Antibiotic choice and dosing should be determined by a healthcare provider. Guidance is based on the CDC 2021 STI Treatment Guidelines and CDC STI information.
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Dr. Michael Thompson is an expert in sexually transmitted diseases with extensive clinical and research experience. He leads campaigns advocating for early diagnosis and prevention of diseases like HIV and gonorrhea. He collaborates with local organizations to educate both youth and adults about sexual health.