Short answer
Post-treatment reinfection is a network problem with a network solution: most repeat STIs come from untreated partners or new exposures, not drug failure, so prevention means treating all partners simultaneously, abstaining through clearance together, retesting on schedule, and then upgrading the habits that allowed the first infection.
Cure the episode and the pattern in one protocol.
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See Tests & Prices →The reinfection audit (run at every repeat positive)
Before assuming resistance, verify four links: partner treatment (were all recent partners evaluated and treated, or just told to “get checked sometime”?), abstinence-window compliance (any sex before everyone completed therapy with resolved symptoms?), new exposures since therapy (new partners reset the clock entirely), and adherence (missed doses, vomiting, drug interactions).
Most “treatment-resistant” cases resolve to network gaps on careful history. Which is good news, because gaps are fixable and resistance often isn’t.
Simultaneous therapy mechanics that work
Same-day treatment starts for patient and partners where possible.
Shared abstinence timelines with a defined end date both sides honor.
Mutual completion confirmation. Not assumed, verified. Joint retesting appointments that catch silent reinfections early.
EPT (expedited partner therapy) covers hard-to-reach partners with medication-without-exam where legal.
Provider-assisted notification covers unsafe or unreachable dynamics.
See How Partner Treatment Works.
Exposure reduction going forward
Consistent condoms (technique-reviewed, not just intended), screening cadence matched to actual risk (quarterly with ongoing risk, yearly baselines otherwise), pre-sex testing talks with new partners as standard practice, and biomedical layers where applicable: PrEP evaluation for ongoing HIV risk, HPV and hepatitis B vaccine completion.
Each layer covers gaps the others leave; the episode just demonstrated what gaps cost.
When to seek care
At treatment start. Build the reinfection plan immediately, not at the retest.
For partner-therapy assistance (EPT eligibility, provider referral).
On every 3-month retest date even when feeling cured.
And back promptly for new symptoms or exposures, which restart the protocol rather than continuing the old one.