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STDs & Sexual Health

How Long Are You Contagious After Starting STD Treatment?

Linda Girgis | MD

Medically reviewed by Linda Girgis | MD, Girgis Family Medicine on August 20th, 2026.

Most STDs become non-contagious within 24-48 hours of starting proper antibiotic treatment. Bacterial infections like chlamydia, gonorrhea, and syphilis typically clear infectious status within 1-2 days of beginning antibiotics. However, you should complete the entire prescribed course, usually 7-10 days, to ensure full treatment. Viral STDs like herpes and HIV require different considerations - herpes outbreaks become less contagious as lesions heal, while HIV becomes undetectable and untransmittable after consistent treatment for 3-6 months. Always follow your healthcare provider's specific guidance and avoid sexual contact until cleared, as some infections may take longer to become non-infectious despite symptom improvement.

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